/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:32:06,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:32:06,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:32:06,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:32:06,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:32:06,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:32:06,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:32:06,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:32:06,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:32:06,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:32:06,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:32:06,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:32:06,255 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:32:06,255 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:32:06,256 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:32:06,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:32:06,257 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:32:06,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:32:06,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:32:06,257 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:32:06,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:32:06,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:32:06,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:32:06,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:32:06,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:32:06,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:32:06,260 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:32:06,261 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:32:06,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:32:06,261 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:32:06,261 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:32:06,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:32:06,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:32:06,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:32:06,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:32:06,448 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:32:06,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.oepc_bound2.i [2023-08-04 07:32:07,352 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:32:07,609 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:32:07,609 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.oepc_bound2.i [2023-08-04 07:32:07,638 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f903f0e/d23a60f100de4fa4b74e98e6afe86afe/FLAGb02ed6184 [2023-08-04 07:32:07,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23f903f0e/d23a60f100de4fa4b74e98e6afe86afe [2023-08-04 07:32:07,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:32:07,658 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:32:07,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:32:07,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:32:07,664 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:32:07,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:32:07" (1/1) ... [2023-08-04 07:32:07,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75119d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:07, skipping insertion in model container [2023-08-04 07:32:07,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:32:07" (1/1) ... [2023-08-04 07:32:07,716 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:32:07,860 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.oepc_bound2.i[995,1008] [2023-08-04 07:32:08,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:32:08,036 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:32:08,044 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.oepc_bound2.i[995,1008] [2023-08-04 07:32:08,048 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:32:08,049 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:32:08,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:32:08,105 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:32:08,105 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:32:08,109 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:32:08,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08 WrapperNode [2023-08-04 07:32:08,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:32:08,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:32:08,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:32:08,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:32:08,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,159 INFO L138 Inliner]: procedures = 177, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 187 [2023-08-04 07:32:08,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:32:08,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:32:08,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:32:08,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:32:08,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:32:08,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:32:08,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:32:08,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:32:08,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (1/1) ... [2023-08-04 07:32:08,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:32:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:32:08,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:32:08,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:32:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:32:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:32:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:32:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:32:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:32:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:32:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:32:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:32:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:32:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:32:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:32:08,258 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:32:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:32:08,258 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:32:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:32:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:32:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:32:08,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:32:08,259 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:32:08,431 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:32:08,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:32:08,760 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:32:08,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:32:08,972 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:32:08,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:32:08 BoogieIcfgContainer [2023-08-04 07:32:08,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:32:08,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:32:08,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:32:08,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:32:08,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:32:07" (1/3) ... [2023-08-04 07:32:08,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46859c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:32:08, skipping insertion in model container [2023-08-04 07:32:08,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:32:08" (2/3) ... [2023-08-04 07:32:08,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46859c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:32:08, skipping insertion in model container [2023-08-04 07:32:08,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:32:08" (3/3) ... [2023-08-04 07:32:08,982 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_thin002_power.oepc_bound2.i [2023-08-04 07:32:08,987 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:32:08,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:32:08,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:32:08,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:32:09,083 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:32:09,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 175 transitions, 370 flow [2023-08-04 07:32:09,291 INFO L124 PetriNetUnfolderBase]: 62/938 cut-off events. [2023-08-04 07:32:09,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:09,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 938 events. 62/938 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5560 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 567. Up to 32 conditions per place. [2023-08-04 07:32:09,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 175 transitions, 370 flow [2023-08-04 07:32:09,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 157 transitions, 326 flow [2023-08-04 07:32:09,308 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:32:09,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 157 transitions, 326 flow [2023-08-04 07:32:09,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 157 transitions, 326 flow [2023-08-04 07:32:09,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 157 transitions, 326 flow [2023-08-04 07:32:09,381 INFO L124 PetriNetUnfolderBase]: 46/699 cut-off events. [2023-08-04 07:32:09,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 699 events. 46/699 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3715 event pairs, 0 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 441. Up to 32 conditions per place. [2023-08-04 07:32:09,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 2776 [2023-08-04 07:32:15,760 INFO L134 LiptonReduction]: Checked pairs total: 7328 [2023-08-04 07:32:15,760 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 07:32:15,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:32:15,780 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;@5aa491f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:32:15,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:32:15,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:32:15,786 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-04 07:32:15,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:15,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:15,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:15,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:15,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:15,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1736617991, now seen corresponding path program 1 times [2023-08-04 07:32:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270389304] [2023-08-04 07:32:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:32:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270389304] [2023-08-04 07:32:16,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270389304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:32:16,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:32:16,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:32:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333531565] [2023-08-04 07:32:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:32:16,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:32:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:32:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:32:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 306 [2023-08-04 07:32:16,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:16,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:16,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 306 [2023-08-04 07:32:16,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:32:17,013 INFO L124 PetriNetUnfolderBase]: 4368/6552 cut-off events. [2023-08-04 07:32:17,013 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 07:32:17,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13102 conditions, 6552 events. 4368/6552 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39485 event pairs, 3006 based on Foata normal form. 240/6174 useless extension candidates. Maximal degree in co-relation 13088. Up to 6412 conditions per place. [2023-08-04 07:32:17,045 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 29 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-04 07:32:17,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 152 flow [2023-08-04 07:32:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:32:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:32:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-04 07:32:17,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479302832244008 [2023-08-04 07:32:17,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-04 07:32:17,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-04 07:32:17,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:32:17,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-04 07:32:17,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:17,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:17,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:17,071 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 82 flow. Second operand 3 states and 503 transitions. [2023-08-04 07:32:17,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 152 flow [2023-08-04 07:32:17,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:32:17,075 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 86 flow [2023-08-04 07:32:17,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-04 07:32:17,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 07:32:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 86 flow [2023-08-04 07:32:17,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:17,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:17,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:17,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:32:17,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:17,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash -599501316, now seen corresponding path program 1 times [2023-08-04 07:32:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120977689] [2023-08-04 07:32:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:32:17,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:17,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120977689] [2023-08-04 07:32:17,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120977689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:32:17,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863295613] [2023-08-04 07:32:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:32:17,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:32:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:32:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:17,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:32:17,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:32:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:32:17,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:32:17,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863295613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:32:17,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:32:17,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:32:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514829217] [2023-08-04 07:32:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:32:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:32:17,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:32:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:32:17,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 306 [2023-08-04 07:32:17,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:17,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:17,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 306 [2023-08-04 07:32:17,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:32:18,014 INFO L124 PetriNetUnfolderBase]: 3098/4561 cut-off events. [2023-08-04 07:32:18,016 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 07:32:18,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9142 conditions, 4561 events. 3098/4561 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25154 event pairs, 2194 based on Foata normal form. 0/4282 useless extension candidates. Maximal degree in co-relation 9125. Up to 4441 conditions per place. [2023-08-04 07:32:18,040 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 31 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-04 07:32:18,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 164 flow [2023-08-04 07:32:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:32:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:32:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-04 07:32:18,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479302832244008 [2023-08-04 07:32:18,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-04 07:32:18,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-04 07:32:18,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:32:18,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-04 07:32:18,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,047 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 86 flow. Second operand 3 states and 503 transitions. [2023-08-04 07:32:18,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 164 flow [2023-08-04 07:32:18,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:32:18,048 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 90 flow [2023-08-04 07:32:18,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-04 07:32:18,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 07:32:18,049 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 90 flow [2023-08-04 07:32:18,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:18,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:18,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:32:18,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:18,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:18,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -504943739, now seen corresponding path program 1 times [2023-08-04 07:32:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28766601] [2023-08-04 07:32:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:32:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28766601] [2023-08-04 07:32:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28766601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:32:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396995206] [2023-08-04 07:32:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:18,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:32:18,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:32:18,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:32:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:18,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:32:18,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:32:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:32:18,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:32:18,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396995206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:32:18,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:32:18,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:32:18,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603916233] [2023-08-04 07:32:18,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:32:18,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:32:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:32:18,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:32:18,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 306 [2023-08-04 07:32:18,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:18,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 306 [2023-08-04 07:32:18,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:32:18,907 INFO L124 PetriNetUnfolderBase]: 2528/3631 cut-off events. [2023-08-04 07:32:18,908 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-04 07:32:18,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7345 conditions, 3631 events. 2528/3631 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18698 event pairs, 1820 based on Foata normal form. 0/3438 useless extension candidates. Maximal degree in co-relation 7328. Up to 3485 conditions per place. [2023-08-04 07:32:18,921 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 33 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 07:32:18,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 176 flow [2023-08-04 07:32:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:32:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:32:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-04 07:32:18,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501089324618736 [2023-08-04 07:32:18,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-04 07:32:18,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-04 07:32:18,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:32:18,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-04 07:32:18,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,926 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 90 flow. Second operand 3 states and 505 transitions. [2023-08-04 07:32:18,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 176 flow [2023-08-04 07:32:18,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:32:18,927 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 94 flow [2023-08-04 07:32:18,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-04 07:32:18,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-04 07:32:18,928 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 94 flow [2023-08-04 07:32:18,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:18,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:18,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:18,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:32:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:32:19,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:19,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash -374591017, now seen corresponding path program 1 times [2023-08-04 07:32:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731662092] [2023-08-04 07:32:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:19,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:32:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731662092] [2023-08-04 07:32:19,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731662092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:32:19,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291191833] [2023-08-04 07:32:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:19,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:32:19,204 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) [2023-08-04 07:32:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:32:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:19,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:32:19,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:32:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:32:19,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:32:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291191833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:32:19,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:32:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:32:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283213294] [2023-08-04 07:32:19,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:32:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:32:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:32:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:32:19,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 306 [2023-08-04 07:32:19,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:19,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:19,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 306 [2023-08-04 07:32:19,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:32:19,781 INFO L124 PetriNetUnfolderBase]: 2312/3325 cut-off events. [2023-08-04 07:32:19,781 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 07:32:19,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6794 conditions, 3325 events. 2312/3325 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16525 event pairs, 1502 based on Foata normal form. 0/3213 useless extension candidates. Maximal degree in co-relation 6776. Up to 2780 conditions per place. [2023-08-04 07:32:19,794 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 36 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 07:32:19,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 192 flow [2023-08-04 07:32:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:32:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:32:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-04 07:32:19,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533769063180828 [2023-08-04 07:32:19,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-04 07:32:19,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-04 07:32:19,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:32:19,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-04 07:32:19,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:19,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:19,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:19,799 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 94 flow. Second operand 3 states and 508 transitions. [2023-08-04 07:32:19,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 192 flow [2023-08-04 07:32:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:32:19,801 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 98 flow [2023-08-04 07:32:19,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-04 07:32:19,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-04 07:32:19,801 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 98 flow [2023-08-04 07:32:19,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:19,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:19,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:19,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:32:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:20,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:20,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -622197254, now seen corresponding path program 1 times [2023-08-04 07:32:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:20,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250074366] [2023-08-04 07:32:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:32:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250074366] [2023-08-04 07:32:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250074366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:32:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450920260] [2023-08-04 07:32:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:20,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:32:20,061 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) [2023-08-04 07:32:20,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:32:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:20,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:32:20,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:32:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:32:20,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:32:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:32:20,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450920260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:32:20,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:32:20,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:32:20,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216211484] [2023-08-04 07:32:20,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:32:20,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:32:20,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:32:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:32:20,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 306 [2023-08-04 07:32:20,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:20,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:20,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 306 [2023-08-04 07:32:20,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:32:20,260 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:32:20,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:20,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:32:20,261 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:32:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:32:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:32:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:32:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-04 07:32:20,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2023-08-04 07:32:20,263 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-04 07:32:20,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-04 07:32:20,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:32:20,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-04 07:32:20,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:20,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:20,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:20,268 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 98 flow. Second operand 4 states and 630 transitions. [2023-08-04 07:32:20,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:32:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:32:20,268 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:32:20,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 07:32:20,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -23 predicate places. [2023-08-04 07:32:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:32:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:20,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:32:20,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:32:20,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:32:20,479 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:32:20,481 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:32:20,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 175 transitions, 370 flow [2023-08-04 07:32:20,560 INFO L124 PetriNetUnfolderBase]: 62/938 cut-off events. [2023-08-04 07:32:20,560 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:20,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 938 events. 62/938 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5560 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 567. Up to 32 conditions per place. [2023-08-04 07:32:20,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 175 transitions, 370 flow [2023-08-04 07:32:20,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 144 transitions, 308 flow [2023-08-04 07:32:20,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:32:20,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 144 transitions, 308 flow [2023-08-04 07:32:20,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 144 transitions, 308 flow [2023-08-04 07:32:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 144 transitions, 308 flow [2023-08-04 07:32:20,597 INFO L124 PetriNetUnfolderBase]: 14/442 cut-off events. [2023-08-04 07:32:20,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:20,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 442 events. 14/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1873 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-04 07:32:20,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 2048 [2023-08-04 07:32:26,133 INFO L134 LiptonReduction]: Checked pairs total: 5386 [2023-08-04 07:32:26,134 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 07:32:26,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:32:26,143 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;@5aa491f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:32:26,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:32:26,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:32:26,146 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:32:26,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:32:26,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:26,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:32:26,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:32:26,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash -899190157, now seen corresponding path program 1 times [2023-08-04 07:32:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120528436] [2023-08-04 07:32:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:32:26,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:32:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:32:26,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:32:26,201 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:32:26,201 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:32:26,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:32:26,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:32:26,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:32:26,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:32:26,202 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:32:26,203 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:32:26,203 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:32:26,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:32:26,238 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:32:26,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 204 transitions, 456 flow [2023-08-04 07:32:26,570 INFO L124 PetriNetUnfolderBase]: 282/4264 cut-off events. [2023-08-04 07:32:26,570 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:32:26,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4553 conditions, 4264 events. 282/4264 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40665 event pairs, 0 based on Foata normal form. 0/3781 useless extension candidates. Maximal degree in co-relation 3086. Up to 162 conditions per place. [2023-08-04 07:32:26,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 204 transitions, 456 flow [2023-08-04 07:32:26,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 186 transitions, 404 flow [2023-08-04 07:32:26,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:32:26,603 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 186 transitions, 404 flow [2023-08-04 07:32:26,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 186 transitions, 404 flow [2023-08-04 07:32:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 186 transitions, 404 flow [2023-08-04 07:32:26,848 INFO L124 PetriNetUnfolderBase]: 201/3090 cut-off events. [2023-08-04 07:32:26,848 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:32:26,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3299 conditions, 3090 events. 201/3090 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 27262 event pairs, 0 based on Foata normal form. 0/2769 useless extension candidates. Maximal degree in co-relation 2291. Up to 162 conditions per place. [2023-08-04 07:32:26,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 6996 [2023-08-04 07:32:34,683 INFO L134 LiptonReduction]: Checked pairs total: 20027 [2023-08-04 07:32:34,683 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-04 07:32:34,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:32:34,686 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;@5aa491f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:32:34,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:32:34,691 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:32:34,691 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 07:32:34,691 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:32:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:32:34,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:32:34,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:32:34,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:32:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -19719593, now seen corresponding path program 1 times [2023-08-04 07:32:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:32:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920405853] [2023-08-04 07:32:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:32:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:32:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:32:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:32:34,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:32:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920405853] [2023-08-04 07:32:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920405853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:32:34,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:32:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:32:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222442754] [2023-08-04 07:32:34,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:32:34,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:32:34,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:32:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:32:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:32:34,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 343 [2023-08-04 07:32:34,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:32:34,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:32:34,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 343 [2023-08-04 07:32:34,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand