/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_circular_buffer_bad_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:15:44,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:15:44,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:15:44,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:15:44,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:15:44,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:15:44,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:15:44,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:15:44,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:15:44,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:15:44,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:15:44,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:15:44,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:15:44,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:15:44,482 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:15:44,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:15:44,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:15:44,482 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:15:44,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:15:44,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:15:44,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:15:44,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:15:44,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:15:44,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:15:44,484 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:15:44,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:15:44,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:15:44,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:15:44,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:15:44,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:15:44,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:15:44,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:15:44,487 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:15:44,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:15:44,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:15:44,488 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:15:44,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:15:44,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:15:44,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:15:44,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:15:44,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:15:44,741 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:15:44,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_circular_buffer_bad_bound2.i [2023-08-03 16:15:45,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:15:46,129 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:15:46,130 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_circular_buffer_bad_bound2.i [2023-08-03 16:15:46,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3040d16b/4f453a34a9604485a4129122d82e4264/FLAG8b5e81880 [2023-08-03 16:15:46,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3040d16b/4f453a34a9604485a4129122d82e4264 [2023-08-03 16:15:46,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:15:46,170 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:15:46,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:15:46,173 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:15:46,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:15:46,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651bc190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46, skipping insertion in model container [2023-08-03 16:15:46,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,221 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:15:46,478 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-deagle_circular_buffer_bad_bound2.i[30440,30453] [2023-08-03 16:15:46,488 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-deagle_circular_buffer_bad_bound2.i[30895,30908] [2023-08-03 16:15:46,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:15:46,521 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:15:46,550 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [208] [2023-08-03 16:15:46,551 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [209] [2023-08-03 16:15:46,577 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-deagle_circular_buffer_bad_bound2.i[30440,30453] [2023-08-03 16:15:46,583 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-deagle_circular_buffer_bad_bound2.i[30895,30908] [2023-08-03 16:15:46,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:15:46,629 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:15:46,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46 WrapperNode [2023-08-03 16:15:46,630 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:15:46,631 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:15:46,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:15:46,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:15:46,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,648 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,671 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 167 [2023-08-03 16:15:46,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:15:46,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:15:46,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:15:46,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:15:46,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:15:46,706 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:15:46,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:15:46,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:15:46,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (1/1) ... [2023-08-03 16:15:46,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:15:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:15:46,732 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) [2023-08-03 16:15:46,739 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 [2023-08-03 16:15:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 16:15:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 16:15:46,762 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 16:15:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 16:15:46,762 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 16:15:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:15:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:15:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:15:46,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:15:46,765 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 16:15:46,872 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:15:46,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:15:47,100 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:15:47,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:15:47,107 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 16:15:47,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:15:47 BoogieIcfgContainer [2023-08-03 16:15:47,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:15:47,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:15:47,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:15:47,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:15:47,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:15:46" (1/3) ... [2023-08-03 16:15:47,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2029c445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:15:47, skipping insertion in model container [2023-08-03 16:15:47,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:15:46" (2/3) ... [2023-08-03 16:15:47,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2029c445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:15:47, skipping insertion in model container [2023-08-03 16:15:47,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:15:47" (3/3) ... [2023-08-03 16:15:47,117 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-deagle_circular_buffer_bad_bound2.i [2023-08-03 16:15:47,124 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:15:47,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:15:47,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 16:15:47,144 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:15:47,232 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 16:15:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,342 INFO L124 PetriNetUnfolderBase]: 37/311 cut-off events. [2023-08-03 16:15:47,342 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 16:15:47,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 37/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1214 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-03 16:15:47,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,358 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:15:47,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 170 transitions, 362 flow [2023-08-03 16:15:47,433 INFO L124 PetriNetUnfolderBase]: 37/311 cut-off events. [2023-08-03 16:15:47,434 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 16:15:47,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 37/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1214 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-03 16:15:47,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 9516 [2023-08-03 16:15:51,566 INFO L134 LiptonReduction]: Checked pairs total: 18703 [2023-08-03 16:15:51,566 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-03 16:15:51,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:15:51,584 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;@4b1f9fd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:15:51,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 16:15:51,590 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:15:51,590 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-03 16:15:51,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:15:51,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:15:51,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:15:51,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:15:51,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:15:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1813528236, now seen corresponding path program 1 times [2023-08-03 16:15:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:15:51,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13133003] [2023-08-03 16:15:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:15:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:15:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:15:51,764 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:15:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:15:51,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:15:51,840 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:15:51,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 16:15:51,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-03 16:15:51,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 16:15:51,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 16:15:51,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 16:15:51,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 16:15:51,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:15:51,845 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 16:15:51,854 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:15:51,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:15:51,906 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 16:15:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,074 INFO L124 PetriNetUnfolderBase]: 141/916 cut-off events. [2023-08-03 16:15:52,074 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 16:15:52,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 916 events. 141/916 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5166 event pairs, 1 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 565. Up to 32 conditions per place. [2023-08-03 16:15:52,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:15:52,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,097 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 250 transitions, 548 flow [2023-08-03 16:15:52,233 INFO L124 PetriNetUnfolderBase]: 141/916 cut-off events. [2023-08-03 16:15:52,233 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 16:15:52,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 916 events. 141/916 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5166 event pairs, 1 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 565. Up to 32 conditions per place. [2023-08-03 16:15:52,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 31460 [2023-08-03 16:15:56,668 INFO L134 LiptonReduction]: Checked pairs total: 102789 [2023-08-03 16:15:56,669 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-03 16:15:56,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:15:56,672 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;@4b1f9fd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:15:56,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 16:15:56,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:15:56,677 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2023-08-03 16:15:56,677 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 16:15:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:15:56,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:15:56,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:15:56,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:15:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -46527293, now seen corresponding path program 1 times [2023-08-03 16:15:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:15:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324640307] [2023-08-03 16:15:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:15:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:15:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:15:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:15:56,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:15:56,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324640307] [2023-08-03 16:15:56,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324640307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:15:56,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:15:56,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:15:56,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485253012] [2023-08-03 16:15:56,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:15:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:15:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:15:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:15:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:15:56,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 444 [2023-08-03 16:15:56,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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) [2023-08-03 16:15:56,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:15:56,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 444 [2023-08-03 16:15:56,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:16:39,744 INFO L124 PetriNetUnfolderBase]: 580583/772698 cut-off events. [2023-08-03 16:16:39,745 INFO L125 PetriNetUnfolderBase]: For 33030/33030 co-relation queries the response was YES. [2023-08-03 16:16:41,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495717 conditions, 772698 events. 580583/772698 cut-off events. For 33030/33030 co-relation queries the response was YES. Maximal size of possible extension queue 24891. Compared 5856095 event pairs, 358805 based on Foata normal form. 24467/559372 useless extension candidates. Maximal degree in co-relation 178714. Up to 705243 conditions per place. [2023-08-03 16:16:44,592 INFO L140 encePairwiseOnDemand]: 439/444 looper letters, 83 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-03 16:16:44,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 432 flow [2023-08-03 16:16:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:16:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:16:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-03 16:16:44,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578078078078078 [2023-08-03 16:16:44,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-03 16:16:44,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-03 16:16:44,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:16:44,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-03 16:16:44,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 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) [2023-08-03 16:16:44,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:16:44,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:16:44,631 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 238 flow. Second operand 3 states and 743 transitions. [2023-08-03 16:16:44,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 432 flow [2023-08-03 16:16:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:16:44,658 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 246 flow [2023-08-03 16:16:44,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2023-08-03 16:16:44,665 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2023-08-03 16:16:44,667 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 246 flow [2023-08-03 16:16:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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) [2023-08-03 16:16:44,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:16:44,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:16:44,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:16:44,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:16:44,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:16:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2072938633, now seen corresponding path program 1 times [2023-08-03 16:16:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:16:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498257164] [2023-08-03 16:16:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:16:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:16:44,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-03 16:16:44,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487096943] [2023-08-03 16:16:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:16:44,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:16:44,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:16:44,718 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) [2023-08-03 16:16:44,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 16:16:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:16:44,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:16:44,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:16:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:16:44,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:16:44,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:16:44,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498257164] [2023-08-03 16:16:44,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-03 16:16:44,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487096943] [2023-08-03 16:16:44,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487096943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:16:44,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:16:44,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:16:44,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099988273] [2023-08-03 16:16:44,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:16:44,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:16:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:16:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:16:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:16:46,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-08-03 16:16:48,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-08-03 16:16:51,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-08-03 16:16:51,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 444 [2023-08-03 16:16:51,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 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) [2023-08-03 16:16:51,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:16:51,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 444 [2023-08-03 16:16:51,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:17:43,544 INFO L124 PetriNetUnfolderBase]: 630773/838229 cut-off events. [2023-08-03 16:17:43,544 INFO L125 PetriNetUnfolderBase]: For 35494/35494 co-relation queries the response was YES. [2023-08-03 16:17:45,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1625732 conditions, 838229 events. 630773/838229 cut-off events. For 35494/35494 co-relation queries the response was YES. Maximal size of possible extension queue 22441. Compared 6219870 event pairs, 497962 based on Foata normal form. 0/597457 useless extension candidates. Maximal degree in co-relation 1625643. Up to 768140 conditions per place. [2023-08-03 16:17:48,645 INFO L140 encePairwiseOnDemand]: 441/444 looper letters, 72 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-08-03 16:17:48,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 388 flow [2023-08-03 16:17:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:17:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:17:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-08-03 16:17:48,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285285285285285 [2023-08-03 16:17:48,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-08-03 16:17:48,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-08-03 16:17:48,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:17:48,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-08-03 16:17:48,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2023-08-03 16:17:48,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:17:48,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:17:48,654 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 246 flow. Second operand 3 states and 704 transitions. [2023-08-03 16:17:48,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 388 flow [2023-08-03 16:17:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:17:48,667 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 242 flow [2023-08-03 16:17:48,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2023-08-03 16:17:48,668 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 2 predicate places. [2023-08-03 16:17:48,668 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 242 flow [2023-08-03 16:17:48,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 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) [2023-08-03 16:17:48,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:17:48,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:17:48,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 16:17:48,874 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 [2023-08-03 16:17:48,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:17:48,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:17:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash -446487228, now seen corresponding path program 1 times [2023-08-03 16:17:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:17:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601906394] [2023-08-03 16:17:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:17:48,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:17:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:17:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:17:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:17:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601906394] [2023-08-03 16:17:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601906394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:17:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389516775] [2023-08-03 16:17:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:17:48,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:17:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:17:48,979 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) [2023-08-03 16:17:48,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 16:17:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:17:49,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:17:49,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:17:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:17:49,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:17:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389516775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:17:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:17:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:17:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450145065] [2023-08-03 16:17:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:17:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:17:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:17:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:17:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:17:49,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 444 [2023-08-03 16:17:49,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 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) [2023-08-03 16:17:49,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:17:49,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 444 [2023-08-03 16:17:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:18:25,968 INFO L124 PetriNetUnfolderBase]: 482857/641663 cut-off events. [2023-08-03 16:18:25,968 INFO L125 PetriNetUnfolderBase]: For 28442/28442 co-relation queries the response was YES. [2023-08-03 16:18:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245437 conditions, 641663 events. 482857/641663 cut-off events. For 28442/28442 co-relation queries the response was YES. Maximal size of possible extension queue 18482. Compared 4668130 event pairs, 183940 based on Foata normal form. 90/449428 useless extension candidates. Maximal degree in co-relation 1245425. Up to 587963 conditions per place. [2023-08-03 16:18:29,946 INFO L140 encePairwiseOnDemand]: 440/444 looper letters, 100 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-08-03 16:18:29,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 125 transitions, 514 flow [2023-08-03 16:18:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:18:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:18:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1190 transitions. [2023-08-03 16:18:29,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536036036036036 [2023-08-03 16:18:29,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1190 transitions. [2023-08-03 16:18:29,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1190 transitions. [2023-08-03 16:18:29,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:18:29,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1190 transitions. [2023-08-03 16:18:29,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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) [2023-08-03 16:18:29,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 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) [2023-08-03 16:18:29,958 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 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) [2023-08-03 16:18:29,958 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 242 flow. Second operand 5 states and 1190 transitions. [2023-08-03 16:18:29,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 125 transitions, 514 flow [2023-08-03 16:18:29,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:18:29,971 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 250 flow [2023-08-03 16:18:29,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2023-08-03 16:18:29,972 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 4 predicate places. [2023-08-03 16:18:29,972 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 250 flow [2023-08-03 16:18:29,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 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) [2023-08-03 16:18:29,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:18:29,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:18:29,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 16:18:30,177 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 [2023-08-03 16:18:30,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:18:30,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:18:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1169408780, now seen corresponding path program 1 times [2023-08-03 16:18:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:18:30,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349586836] [2023-08-03 16:18:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:18:30,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:18:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:18:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:18:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:18:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349586836] [2023-08-03 16:18:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349586836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:18:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018755668] [2023-08-03 16:18:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:18:30,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:18:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:18:30,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:18:30,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 16:18:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:18:30,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:18:30,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:18:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:18:30,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:18:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:18:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018755668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:18:30,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:18:30,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 16:18:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279650907] [2023-08-03 16:18:30,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:18:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:18:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:18:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:18:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:18:30,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 444 [2023-08-03 16:18:30,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 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) [2023-08-03 16:18:30,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:18:30,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 444 [2023-08-03 16:18:30,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:19:02,141 INFO L124 PetriNetUnfolderBase]: 470762/623768 cut-off events. [2023-08-03 16:19:02,141 INFO L125 PetriNetUnfolderBase]: For 23012/23012 co-relation queries the response was YES. [2023-08-03 16:19:03,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209056 conditions, 623768 events. 470762/623768 cut-off events. For 23012/23012 co-relation queries the response was YES. Maximal size of possible extension queue 18653. Compared 4503117 event pairs, 178992 based on Foata normal form. 10/436468 useless extension candidates. Maximal degree in co-relation 1209042. Up to 572579 conditions per place. [2023-08-03 16:19:06,019 INFO L140 encePairwiseOnDemand]: 441/444 looper letters, 100 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2023-08-03 16:19:06,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 516 flow [2023-08-03 16:19:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:19:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:19:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 972 transitions. [2023-08-03 16:19:06,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472972972972973 [2023-08-03 16:19:06,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 972 transitions. [2023-08-03 16:19:06,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 972 transitions. [2023-08-03 16:19:06,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:19:06,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 972 transitions. [2023-08-03 16:19:06,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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) [2023-08-03 16:19:06,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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) [2023-08-03 16:19:06,029 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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) [2023-08-03 16:19:06,029 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 250 flow. Second operand 4 states and 972 transitions. [2023-08-03 16:19:06,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 516 flow [2023-08-03 16:19:06,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 511 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 16:19:06,035 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 243 flow [2023-08-03 16:19:06,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2023-08-03 16:19:06,036 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2023-08-03 16:19:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 243 flow [2023-08-03 16:19:06,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 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) [2023-08-03 16:19:06,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:19:06,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:19:06,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 16:19:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:19:06,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:19:06,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:19:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1196154774, now seen corresponding path program 1 times [2023-08-03 16:19:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:19:06,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813922621] [2023-08-03 16:19:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:19:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:19:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:19:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:19:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:19:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813922621] [2023-08-03 16:19:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813922621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:19:06,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:19:06,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:19:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122141761] [2023-08-03 16:19:06,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:19:06,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:19:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:19:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:19:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:19:06,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 444 [2023-08-03 16:19:06,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:19:06,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:19:06,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 444 [2023-08-03 16:19:06,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:20:10,121 INFO L124 PetriNetUnfolderBase]: 825761/1095122 cut-off events. [2023-08-03 16:20:10,121 INFO L125 PetriNetUnfolderBase]: For 44543/44543 co-relation queries the response was YES. [2023-08-03 16:20:13,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141333 conditions, 1095122 events. 825761/1095122 cut-off events. For 44543/44543 co-relation queries the response was YES. Maximal size of possible extension queue 20853. Compared 8188401 event pairs, 284536 based on Foata normal form. 0/785450 useless extension candidates. Maximal degree in co-relation 2141319. Up to 592155 conditions per place. [2023-08-03 16:20:17,023 INFO L140 encePairwiseOnDemand]: 437/444 looper letters, 135 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2023-08-03 16:20:17,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 159 transitions, 708 flow [2023-08-03 16:20:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:20:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:20:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-03 16:20:17,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5870870870870871 [2023-08-03 16:20:17,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-03 16:20:17,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-03 16:20:17,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:20:17,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-03 16:20:17,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-08-03 16:20:17,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:20:17,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:20:17,032 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 243 flow. Second operand 3 states and 782 transitions. [2023-08-03 16:20:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 159 transitions, 708 flow [2023-08-03 16:20:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 159 transitions, 698 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:20:17,045 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 277 flow [2023-08-03 16:20:17,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2023-08-03 16:20:17,045 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 6 predicate places. [2023-08-03 16:20:17,046 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 277 flow [2023-08-03 16:20:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:20:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:20:17,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:20:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 16:20:17,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:20:17,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:20:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1523219891, now seen corresponding path program 1 times [2023-08-03 16:20:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:20:17,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326707672] [2023-08-03 16:20:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:20:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:20:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:20:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:20:17,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:20:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326707672] [2023-08-03 16:20:17,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326707672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:20:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080213858] [2023-08-03 16:20:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:20:17,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:20:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:20:17,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:20:17,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 16:20:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:20:17,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:20:17,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:20:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:20:17,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:20:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080213858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:20:17,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:20:17,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 16:20:17,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496956816] [2023-08-03 16:20:17,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:20:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:20:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:20:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:20:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:20:17,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 444 [2023-08-03 16:20:17,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 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) [2023-08-03 16:20:17,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:20:17,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 444 [2023-08-03 16:20:17,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:21:11,807 INFO L124 PetriNetUnfolderBase]: 729294/942642 cut-off events. [2023-08-03 16:21:11,808 INFO L125 PetriNetUnfolderBase]: For 98885/98965 co-relation queries the response was YES. [2023-08-03 16:21:14,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943284 conditions, 942642 events. 729294/942642 cut-off events. For 98885/98965 co-relation queries the response was YES. Maximal size of possible extension queue 17457. Compared 6638670 event pairs, 13320 based on Foata normal form. 0/719753 useless extension candidates. Maximal degree in co-relation 1943268. Up to 817921 conditions per place. [2023-08-03 16:21:17,629 INFO L140 encePairwiseOnDemand]: 440/444 looper letters, 171 selfloop transitions, 5 changer transitions 0/198 dead transitions. [2023-08-03 16:21:17,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 198 transitions, 853 flow [2023-08-03 16:21:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:21:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:21:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1257 transitions. [2023-08-03 16:21:17,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662162162162162 [2023-08-03 16:21:17,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1257 transitions. [2023-08-03 16:21:17,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1257 transitions. [2023-08-03 16:21:17,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:21:17,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1257 transitions. [2023-08-03 16:21:17,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 251.4) internal successors, (1257), 5 states have internal predecessors, (1257), 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) [2023-08-03 16:21:17,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 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) [2023-08-03 16:21:17,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 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) [2023-08-03 16:21:17,638 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 277 flow. Second operand 5 states and 1257 transitions. [2023-08-03 16:21:17,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 198 transitions, 853 flow [2023-08-03 16:21:21,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 831 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 16:21:21,470 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 278 flow [2023-08-03 16:21:21,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2023-08-03 16:21:21,471 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 6 predicate places. [2023-08-03 16:21:21,471 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 278 flow [2023-08-03 16:21:21,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 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) [2023-08-03 16:21:21,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:21:21,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:21:21,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 16:21:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:21:21,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:21:21,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:21:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1847065919, now seen corresponding path program 1 times [2023-08-03 16:21:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:21:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76112916] [2023-08-03 16:21:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:21:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:21:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:21:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:21:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:21:21,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76112916] [2023-08-03 16:21:21,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76112916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:21:21,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:21:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:21:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101325204] [2023-08-03 16:21:21,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:21:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:21:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:21:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:21:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:21:21,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 444 [2023-08-03 16:21:21,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:21:21,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:21:21,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 444 [2023-08-03 16:21:21,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:21:32,126 INFO L124 PetriNetUnfolderBase]: 151172/214862 cut-off events. [2023-08-03 16:21:32,126 INFO L125 PetriNetUnfolderBase]: For 31973/31973 co-relation queries the response was YES. [2023-08-03 16:21:32,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432997 conditions, 214862 events. 151172/214862 cut-off events. For 31973/31973 co-relation queries the response was YES. Maximal size of possible extension queue 4851. Compared 1631327 event pairs, 21482 based on Foata normal form. 0/185113 useless extension candidates. Maximal degree in co-relation 432982. Up to 157031 conditions per place. [2023-08-03 16:21:33,166 INFO L140 encePairwiseOnDemand]: 436/444 looper letters, 108 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2023-08-03 16:21:33,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 134 transitions, 636 flow [2023-08-03 16:21:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:21:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:21:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-08-03 16:21:33,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615615615615616 [2023-08-03 16:21:33,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-08-03 16:21:33,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-08-03 16:21:33,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:21:33,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-08-03 16:21:33,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 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) [2023-08-03 16:21:33,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:21:33,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:21:33,173 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 278 flow. Second operand 3 states and 748 transitions. [2023-08-03 16:21:33,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 134 transitions, 636 flow [2023-08-03 16:21:33,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 634 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:21:33,192 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 285 flow [2023-08-03 16:21:33,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-08-03 16:21:33,193 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-08-03 16:21:33,193 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 285 flow [2023-08-03 16:21:33,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:21:33,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:21:33,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:21:33,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 16:21:33,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:21:33,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:21:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1013520225, now seen corresponding path program 1 times [2023-08-03 16:21:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:21:33,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138041535] [2023-08-03 16:21:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:21:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:21:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:21:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:21:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:21:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138041535] [2023-08-03 16:21:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138041535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:21:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:21:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:21:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754692336] [2023-08-03 16:21:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:21:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:21:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:21:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:21:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:21:33,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 444 [2023-08-03 16:21:33,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:21:33,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:21:33,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 444 [2023-08-03 16:21:33,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:21:47,285 INFO L124 PetriNetUnfolderBase]: 187920/266058 cut-off events. [2023-08-03 16:21:47,285 INFO L125 PetriNetUnfolderBase]: For 46800/46800 co-relation queries the response was YES. [2023-08-03 16:21:48,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553999 conditions, 266058 events. 187920/266058 cut-off events. For 46800/46800 co-relation queries the response was YES. Maximal size of possible extension queue 5082. Compared 1980192 event pairs, 48358 based on Foata normal form. 0/238694 useless extension candidates. Maximal degree in co-relation 553984. Up to 185566 conditions per place. [2023-08-03 16:21:48,909 INFO L140 encePairwiseOnDemand]: 439/444 looper letters, 125 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2023-08-03 16:21:48,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 710 flow [2023-08-03 16:21:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:21:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:21:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-08-03 16:21:48,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5690690690690691 [2023-08-03 16:21:48,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-08-03 16:21:48,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-08-03 16:21:48,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:21:48,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-08-03 16:21:48,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 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) [2023-08-03 16:21:48,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:21:48,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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) [2023-08-03 16:21:48,915 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 285 flow. Second operand 3 states and 758 transitions. [2023-08-03 16:21:48,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 710 flow [2023-08-03 16:21:48,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 148 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:21:48,996 INFO L231 Difference]: Finished difference. Result has 91 places, 97 transitions, 298 flow [2023-08-03 16:21:48,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=91, PETRI_TRANSITIONS=97} [2023-08-03 16:21:48,997 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2023-08-03 16:21:48,997 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 97 transitions, 298 flow [2023-08-03 16:21:48,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2023-08-03 16:21:48,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:21:48,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:21:48,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 16:21:48,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:21:48,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:21:48,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1245385882, now seen corresponding path program 1 times [2023-08-03 16:21:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:21:48,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055524044] [2023-08-03 16:21:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:21:48,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:21:49,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-03 16:21:49,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137148911] [2023-08-03 16:21:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:21:49,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:21:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:21:49,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:21:49,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 16:21:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:21:49,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-03 16:21:49,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:21:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:21:49,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:21:49,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:21:49,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055524044] [2023-08-03 16:21:49,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-03 16:21:49,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137148911] [2023-08-03 16:21:49,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137148911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:21:49,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:21:49,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:21:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822474731] [2023-08-03 16:21:49,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:21:49,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:21:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:21:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:21:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:21:49,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 444 [2023-08-03 16:21:49,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-03 16:21:49,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:21:49,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 444 [2023-08-03 16:21:49,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:22:09,922 INFO L124 PetriNetUnfolderBase]: 250028/355742 cut-off events. [2023-08-03 16:22:09,922 INFO L125 PetriNetUnfolderBase]: For 71346/71346 co-relation queries the response was YES. [2023-08-03 16:22:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738758 conditions, 355742 events. 250028/355742 cut-off events. For 71346/71346 co-relation queries the response was YES. Maximal size of possible extension queue 5708. Compared 2709899 event pairs, 48297 based on Foata normal form. 1881/326401 useless extension candidates. Maximal degree in co-relation 738740. Up to 188718 conditions per place. [2023-08-03 16:22:11,810 INFO L140 encePairwiseOnDemand]: 435/444 looper letters, 184 selfloop transitions, 7 changer transitions 0/210 dead transitions. [2023-08-03 16:22:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 210 transitions, 1032 flow [2023-08-03 16:22:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:22:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:22:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1003 transitions. [2023-08-03 16:22:11,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647522522522522 [2023-08-03 16:22:11,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1003 transitions. [2023-08-03 16:22:11,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1003 transitions. [2023-08-03 16:22:11,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:22:11,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1003 transitions. [2023-08-03 16:22:11,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 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) [2023-08-03 16:22:11,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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) [2023-08-03 16:22:11,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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) [2023-08-03 16:22:11,818 INFO L175 Difference]: Start difference. First operand has 91 places, 97 transitions, 298 flow. Second operand 4 states and 1003 transitions. [2023-08-03 16:22:11,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 210 transitions, 1032 flow [2023-08-03 16:22:11,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 210 transitions, 1029 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:22:11,842 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 343 flow [2023-08-03 16:22:11,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=343, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2023-08-03 16:22:11,843 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2023-08-03 16:22:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 343 flow [2023-08-03 16:22:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-03 16:22:11,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:22:11,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:22:11,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 16:22:12,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 16:22:12,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 16:22:12,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:22:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1413130111, now seen corresponding path program 1 times [2023-08-03 16:22:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:22:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335206653] [2023-08-03 16:22:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:22:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:22:12,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-03 16:22:12,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632424207] [2023-08-03 16:22:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:22:12,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:22:12,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:22:12,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:22:12,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 16:22:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:22:12,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-03 16:22:12,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:22:12,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 16:22:12,406 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-03 16:22:12,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-03 16:22:12,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 16:22:12,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 16:22:12,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 16:22:12,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-03 16:22:13,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-08-03 16:22:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:22:13,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:23:16,426 WARN L233 SmtUtils]: Spent 32.37s on a formula simplification. DAG size of input: 121 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-03 16:23:35,049 WARN L233 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 60 DAG size of output: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-03 16:23:35,104 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_13 Int) (|~#buffer~0.offset| Int) (v_z_18 Int) (v_ArrVal_500 (Array Int Int))) (or (<= 4294967296 v_z_18) (<= 4294967296 v_z_13) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_500) |c_~#buffer~0.base|) (+ |~#buffer~0.offset| v_z_18 (- 4294967296)) (mod |c_t1Thread1of2ForFork0_insertLogElement_~b#1| 256)) (+ |~#buffer~0.offset| v_z_13 (- 4294967297))) 0) (<= v_z_13 2147483648) (<= v_z_18 2147483647))) is different from false [2023-08-03 16:23:37,161 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_13 Int) (|~#buffer~0.offset| Int) (v_z_18 Int) (v_ArrVal_500 (Array Int Int))) (or (<= 4294967296 v_z_18) (<= 4294967296 v_z_13) (<= v_z_13 2147483648) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_500) |c_~#buffer~0.base|) (+ |~#buffer~0.offset| v_z_18 (- 4294967296)) (mod |c_t1Thread1of2ForFork0_insertLogElement_#in~b#1| 256)) (+ |~#buffer~0.offset| v_z_13 (- 4294967297))) 0) (<= v_z_18 2147483647))) is different from false [2023-08-03 16:23:39,253 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_13 Int) (|~#buffer~0.offset| Int) (v_z_18 Int) (v_ArrVal_500 (Array Int Int))) (or (<= 4294967296 v_z_18) (<= 4294967296 v_z_13) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_500) |c_~#buffer~0.base|) (+ |~#buffer~0.offset| v_z_18 (- 4294967296)) (mod |c_t1Thread1of2ForFork0_~i~0#1| 256)) (+ |~#buffer~0.offset| v_z_13 (- 4294967297))) 0) (<= v_z_13 2147483648) (<= v_z_18 2147483647))) is different from false [2023-08-03 16:23:41,315 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_13 Int) (|~#buffer~0.offset| Int) (v_z_18 Int) (v_ArrVal_500 (Array Int Int))) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_500) |c_~#buffer~0.base|) (+ |~#buffer~0.offset| v_z_18 (- 4294967296)) 0) (+ |~#buffer~0.offset| v_z_13 (- 4294967297))) 0) (<= 4294967296 v_z_18) (<= 4294967296 v_z_13) (<= v_z_13 2147483648) (<= v_z_18 2147483647))) is different from false [2023-08-03 16:23:43,363 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_13 Int) (|~#buffer~0.offset| Int) (v_z_18 Int) (v_ArrVal_500 (Array Int Int)) (v_ArrVal_499 (Array Int Int))) (or (<= 4294967296 v_z_18) (= (select (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#id1~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_500) |c_~#buffer~0.base|) (+ |~#buffer~0.offset| v_z_18 (- 4294967296)) 0) (+ |~#buffer~0.offset| v_z_13 (- 4294967297))) 0) (<= 4294967296 v_z_13) (<= v_z_13 2147483648) (<= v_z_18 2147483647))) is different from false [2023-08-03 16:23:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-03 16:23:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:23:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335206653] [2023-08-03 16:23:43,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-03 16:23:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632424207] [2023-08-03 16:23:43,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632424207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:23:43,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-03 16:23:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-03 16:23:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27759206] [2023-08-03 16:23:43,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-03 16:23:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 16:23:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:23:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 16:23:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=157, Unknown=22, NotChecked=150, Total=380 [2023-08-03 16:23:43,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 444 [2023-08-03 16:23:43,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 343 flow. Second operand has 20 states, 20 states have (on average 175.4) internal successors, (3508), 20 states have internal predecessors, (3508), 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) [2023-08-03 16:23:43,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:23:43,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 444 [2023-08-03 16:23:43,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:23:53,817 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-03 16:26:14,828 INFO L124 PetriNetUnfolderBase]: 921723/1287170 cut-off events. [2023-08-03 16:26:14,828 INFO L125 PetriNetUnfolderBase]: For 293259/296021 co-relation queries the response was YES. Received shutdown request... [2023-08-03 16:26:18,325 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 16:26:18,325 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 16:26:19,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 16:26:19,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-03 16:26:19,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713436 conditions, 1287170 events. 921723/1287170 cut-off events. For 293259/296021 co-relation queries the response was YES. Maximal size of possible extension queue 16662. Compared 10692072 event pairs, 150356 based on Foata normal form. 31881/1202452 useless extension candidates. Maximal degree in co-relation 2713416. Up to 307003 conditions per place. Cannot interrupt operation gracefully because timeout expired. Forcing shutdown