/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_safe036_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:31:39,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:31:39,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:31:39,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:31:39,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:31:39,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:31:39,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:31:39,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:31:39,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:31:39,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:31:39,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:31:39,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:31:39,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:31:39,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:31:39,289 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:31:39,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:31:39,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:31:39,289 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:31:39,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:31:39,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:31:39,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:31:39,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:31:39,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:31:39,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:31:39,291 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:31:39,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:31:39,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:31:39,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:31:39,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:31:39,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:31:39,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:31:39,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:31:39,294 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:31:39,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:31:39,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:31:39,294 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:31:39,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:31:39,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:31:39,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:31:39,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:31:39,522 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:31:39,522 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:31:39,524 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-04 07:31:40,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:31:40,944 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:31:40,944 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-04 07:31:40,979 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc96d2270/596c678e1f7d49ed9ead302cdef2a794/FLAG3ad212982 [2023-08-04 07:31:40,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc96d2270/596c678e1f7d49ed9ead302cdef2a794 [2023-08-04 07:31:40,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:31:40,992 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:31:40,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:31:40,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:31:40,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:31:40,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:31:40" (1/1) ... [2023-08-04 07:31:40,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9bfb07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:40, skipping insertion in model container [2023-08-04 07:31:40,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:31:40" (1/1) ... [2023-08-04 07:31:41,028 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:31:41,129 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i[941,954] [2023-08-04 07:31:41,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:31:41,218 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:31:41,226 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_safe036_bound2.i[941,954] [2023-08-04 07:31:41,233 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:31:41,234 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:31:41,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:31:41,266 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:31:41,266 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:31:41,276 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:31:41,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41 WrapperNode [2023-08-04 07:31:41,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:31:41,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:31:41,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:31:41,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:31:41,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,323 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-04 07:31:41,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:31:41,324 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:31:41,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:31:41,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:31:41,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,335 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:31:41,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:31:41,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:31:41,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:31:41,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (1/1) ... [2023-08-04 07:31:41,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:31:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:41,392 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 07:31:41,435 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 07:31:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:31:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:31:41,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:31:41,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:31:41,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:31:41,477 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 07:31:41,565 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:31:41,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:31:41,725 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:31:41,729 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:31:41,729 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 07:31:41,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:31:41 BoogieIcfgContainer [2023-08-04 07:31:41,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:31:41,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:31:41,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:31:41,736 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:31:41,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:31:40" (1/3) ... [2023-08-04 07:31:41,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d3c3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:31:41, skipping insertion in model container [2023-08-04 07:31:41,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:31:41" (2/3) ... [2023-08-04 07:31:41,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d3c3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:31:41, skipping insertion in model container [2023-08-04 07:31:41,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:31:41" (3/3) ... [2023-08-04 07:31:41,737 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe036_bound2.i [2023-08-04 07:31:41,743 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:31:41,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:31:41,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:31:41,750 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:31:41,793 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:31:41,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 07:31:41,862 INFO L124 PetriNetUnfolderBase]: 14/193 cut-off events. [2023-08-04 07:31:41,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:41,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 193 events. 14/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-04 07:31:41,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 07:31:41,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 146 flow [2023-08-04 07:31:41,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:31:41,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 70 transitions, 146 flow [2023-08-04 07:31:41,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 70 transitions, 146 flow [2023-08-04 07:31:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 146 flow [2023-08-04 07:31:41,900 INFO L124 PetriNetUnfolderBase]: 10/150 cut-off events. [2023-08-04 07:31:41,900 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:41,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 150 events. 10/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 376 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 88. Up to 8 conditions per place. [2023-08-04 07:31:41,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2023-08-04 07:31:43,160 INFO L134 LiptonReduction]: Checked pairs total: 1422 [2023-08-04 07:31:43,160 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-04 07:31:43,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:31:43,175 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;@128e42bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:31:43,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:31:43,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:31:43,177 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-04 07:31:43,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:43,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:43,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:31:43,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:43,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash 9099286, now seen corresponding path program 1 times [2023-08-04 07:31:43,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148714827] [2023-08-04 07:31:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:43,365 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 07:31:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148714827] [2023-08-04 07:31:43,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148714827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:43,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:31:43,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:31:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653082898] [2023-08-04 07:31:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:43,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:43,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:31:43,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 143 [2023-08-04 07:31:43,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 07:31:43,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:43,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 143 [2023-08-04 07:31:43,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:43,470 INFO L124 PetriNetUnfolderBase]: 66/138 cut-off events. [2023-08-04 07:31:43,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:43,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 66/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 513 event pairs, 24 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 272. Up to 130 conditions per place. [2023-08-04 07:31:43,472 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 14 selfloop transitions, 2 changer transitions 1/19 dead transitions. [2023-08-04 07:31:43,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 78 flow [2023-08-04 07:31:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-08-04 07:31:43,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407925407925408 [2023-08-04 07:31:43,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-08-04 07:31:43,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-08-04 07:31:43,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:43,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-08-04 07:31:43,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 07:31:43,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 07:31:43,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 07:31:43,490 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 232 transitions. [2023-08-04 07:31:43,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 78 flow [2023-08-04 07:31:43,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:31:43,496 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 46 flow [2023-08-04 07:31:43,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-04 07:31:43,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-08-04 07:31:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 46 flow [2023-08-04 07:31:43,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 07:31:43,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:43,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:31:43,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:43,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:43,503 INFO L85 PathProgramCache]: Analyzing trace with hash 675180844, now seen corresponding path program 1 times [2023-08-04 07:31:43,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:43,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569417928] [2023-08-04 07:31:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:43,561 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 07:31:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:43,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569417928] [2023-08-04 07:31:43,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569417928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897855113] [2023-08-04 07:31:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:43,564 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 07:31:43,580 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 07:31:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:43,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:31:43,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:43,633 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 07:31:43,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:31:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897855113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:31:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:31:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632476786] [2023-08-04 07:31:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:31:43,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 143 [2023-08-04 07:31:43,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 07:31:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 143 [2023-08-04 07:31:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:43,671 INFO L124 PetriNetUnfolderBase]: 62/130 cut-off events. [2023-08-04 07:31:43,671 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:31:43,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 130 events. 62/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 448 event pairs, 28 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 263. Up to 100 conditions per place. [2023-08-04 07:31:43,672 INFO L140 encePairwiseOnDemand]: 140/143 looper letters, 16 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-08-04 07:31:43,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2023-08-04 07:31:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-04 07:31:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431235431235432 [2023-08-04 07:31:43,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-04 07:31:43,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-04 07:31:43,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:43,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-04 07:31:43,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 07:31:43,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 07:31:43,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 07:31:43,677 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 46 flow. Second operand 3 states and 233 transitions. [2023-08-04 07:31:43,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2023-08-04 07:31:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:31:43,678 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 50 flow [2023-08-04 07:31:43,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-04 07:31:43,679 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-04 07:31:43,679 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 50 flow [2023-08-04 07:31:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 07:31:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:43,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:31:43,884 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 07:31:43,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:43,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash 970948771, now seen corresponding path program 1 times [2023-08-04 07:31:43,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:43,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681719918] [2023-08-04 07:31:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:43,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:43,938 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 07:31:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681719918] [2023-08-04 07:31:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681719918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312400453] [2023-08-04 07:31:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:43,940 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 07:31:43,959 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 07:31:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:43,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:31:43,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:44,015 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 07:31:44,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:31:44,027 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 07:31:44,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312400453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:31:44,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:31:44,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:31:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370949796] [2023-08-04 07:31:44,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:31:44,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:31:44,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:31:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:31:44,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-04 07:31:44,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 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 07:31:44,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:44,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-04 07:31:44,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:44,052 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:31:44,052 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:31:44,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. 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 07:31:44,052 INFO L140 encePairwiseOnDemand]: 140/143 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:31:44,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 43 flow [2023-08-04 07:31:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:31:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:31:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2023-08-04 07:31:44,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506993006993007 [2023-08-04 07:31:44,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 290 transitions. [2023-08-04 07:31:44,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 290 transitions. [2023-08-04 07:31:44,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:44,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 290 transitions. [2023-08-04 07:31:44,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 07:31:44,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 07:31:44,056 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 07:31:44,057 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 50 flow. Second operand 4 states and 290 transitions. [2023-08-04 07:31:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 43 flow [2023-08-04 07:31:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:31:44,057 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 07:31:44,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=13, 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=16, PETRI_TRANSITIONS=0} [2023-08-04 07:31:44,058 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -5 predicate places. [2023-08-04 07:31:44,058 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 07:31:44,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 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 07:31:44,060 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:31:44,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:31:44,282 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 07:31:44,282 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 07:31:44,284 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:31:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 07:31:44,297 INFO L124 PetriNetUnfolderBase]: 14/193 cut-off events. [2023-08-04 07:31:44,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 193 events. 14/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-04 07:31:44,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 07:31:44,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 122 flow [2023-08-04 07:31:44,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:31:44,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 07:31:44,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 07:31:44,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 122 flow [2023-08-04 07:31:44,303 INFO L124 PetriNetUnfolderBase]: 2/89 cut-off events. [2023-08-04 07:31:44,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:44,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-04 07:31:44,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-08-04 07:31:45,310 INFO L134 LiptonReduction]: Checked pairs total: 916 [2023-08-04 07:31:45,310 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-04 07:31:45,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:31:45,314 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;@128e42bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:31:45,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:31:45,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:31:45,317 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 07:31:45,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:45,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:45,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:31:45,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:31:45,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 325224705, now seen corresponding path program 1 times [2023-08-04 07:31:45,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:45,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763673059] [2023-08-04 07:31:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:45,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:45,402 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 07:31:45,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:45,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763673059] [2023-08-04 07:31:45,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763673059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:45,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:31:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:31:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233713402] [2023-08-04 07:31:45,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:45,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:45,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:31:45,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 127 [2023-08-04 07:31:45,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 07:31:45,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:45,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 127 [2023-08-04 07:31:45,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:45,440 INFO L124 PetriNetUnfolderBase]: 24/72 cut-off events. [2023-08-04 07:31:45,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 72 events. 24/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 234 event pairs, 6 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 134. Up to 52 conditions per place. [2023-08-04 07:31:45,444 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 12 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-04 07:31:45,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 74 flow [2023-08-04 07:31:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-04 07:31:45,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984251968503937 [2023-08-04 07:31:45,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-04 07:31:45,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-04 07:31:45,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:45,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-04 07:31:45,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 07:31:45,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 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 07:31:45,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 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 07:31:45,449 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 40 flow. Second operand 3 states and 228 transitions. [2023-08-04 07:31:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 74 flow [2023-08-04 07:31:45,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:31:45,450 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 48 flow [2023-08-04 07:31:45,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-04 07:31:45,453 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 07:31:45,453 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 48 flow [2023-08-04 07:31:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 07:31:45,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:45,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:31:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:31:45,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:31:45,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1488397244, now seen corresponding path program 1 times [2023-08-04 07:31:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561024317] [2023-08-04 07:31:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:45,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:31:45,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:31:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:31:45,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:31:45,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:31:45,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:31:45,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:31:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:31:45,511 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:31:45,512 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:31:45,512 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:31:45,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:31:45,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:31:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 07:31:45,554 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 07:31:45,554 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:31:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1732 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-04 07:31:45,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 07:31:45,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 84 transitions, 184 flow [2023-08-04 07:31:45,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:31:45,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 07:31:45,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 07:31:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 84 transitions, 184 flow [2023-08-04 07:31:45,577 INFO L124 PetriNetUnfolderBase]: 21/318 cut-off events. [2023-08-04 07:31:45,577 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:31:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 318 events. 21/318 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1170 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 233. Up to 18 conditions per place. [2023-08-04 07:31:45,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-04 07:31:46,834 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-08-04 07:31:46,835 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 07:31:46,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:31:46,837 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;@128e42bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:31:46,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:31:46,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:31:46,838 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-04 07:31:46,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:31:46,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:46,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:31:46,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:46,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash 15873723, now seen corresponding path program 1 times [2023-08-04 07:31:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:46,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865879451] [2023-08-04 07:31:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:46,855 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 07:31:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865879451] [2023-08-04 07:31:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865879451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:46,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:31:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:31:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082485531] [2023-08-04 07:31:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:31:46,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-04 07:31:46,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 07:31:46,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:46,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-04 07:31:46,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:47,109 INFO L124 PetriNetUnfolderBase]: 1674/2803 cut-off events. [2023-08-04 07:31:47,110 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 07:31:47,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2803 events. 1674/2803 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16479 event pairs, 1140 based on Foata normal form. 0/2610 useless extension candidates. Maximal degree in co-relation 1555. Up to 2476 conditions per place. [2023-08-04 07:31:47,121 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 07:31:47,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 124 flow [2023-08-04 07:31:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-04 07:31:47,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693581780538303 [2023-08-04 07:31:47,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-04 07:31:47,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-04 07:31:47,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:47,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-04 07:31:47,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 07:31:47,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:47,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:47,125 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 70 flow. Second operand 3 states and 275 transitions. [2023-08-04 07:31:47,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 124 flow [2023-08-04 07:31:47,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:31:47,127 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 80 flow [2023-08-04 07:31:47,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 07:31:47,128 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 07:31:47,130 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 80 flow [2023-08-04 07:31:47,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 07:31:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:47,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:31:47,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:47,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash 280940292, now seen corresponding path program 1 times [2023-08-04 07:31:47,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204630062] [2023-08-04 07:31:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:47,184 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 07:31:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204630062] [2023-08-04 07:31:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204630062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445556345] [2023-08-04 07:31:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:47,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:47,193 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 07:31:47,241 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 07:31:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:47,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:31:47,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:47,308 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 07:31:47,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:31:47,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445556345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:47,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:31:47,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:31:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44530296] [2023-08-04 07:31:47,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:31:47,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-04 07:31:47,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 07:31:47,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:47,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-04 07:31:47,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:47,485 INFO L124 PetriNetUnfolderBase]: 1646/2693 cut-off events. [2023-08-04 07:31:47,485 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 07:31:47,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 2693 events. 1646/2693 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15420 event pairs, 1120 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 5265. Up to 2299 conditions per place. [2023-08-04 07:31:47,497 INFO L140 encePairwiseOnDemand]: 158/161 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 07:31:47,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 154 flow [2023-08-04 07:31:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-04 07:31:47,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755693581780539 [2023-08-04 07:31:47,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-04 07:31:47,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-04 07:31:47,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:47,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-04 07:31:47,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 07:31:47,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:47,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:47,500 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 80 flow. Second operand 3 states and 278 transitions. [2023-08-04 07:31:47,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 154 flow [2023-08-04 07:31:47,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:31:47,502 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 90 flow [2023-08-04 07:31:47,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 07:31:47,502 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 07:31:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 90 flow [2023-08-04 07:31:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 07:31:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:47,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:47,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:31:47,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:47,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:47,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -785608638, now seen corresponding path program 1 times [2023-08-04 07:31:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:47,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44079387] [2023-08-04 07:31:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:47,733 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 07:31:47,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44079387] [2023-08-04 07:31:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44079387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211730625] [2023-08-04 07:31:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:47,762 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 07:31:47,763 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 07:31:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:47,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:31:47,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:47,827 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 07:31:47,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:31:47,840 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 07:31:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211730625] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:31:47,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:31:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 07:31:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613382125] [2023-08-04 07:31:47,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:31:47,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:31:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:31:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:31:47,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 07:31:47,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 07:31:47,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:47,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 07:31:47,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:47,984 INFO L124 PetriNetUnfolderBase]: 1336/2141 cut-off events. [2023-08-04 07:31:47,984 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 07:31:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 2141 events. 1336/2141 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11336 event pairs, 564 based on Foata normal form. 3/2134 useless extension candidates. Maximal degree in co-relation 1599. Up to 1882 conditions per place. [2023-08-04 07:31:47,994 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 26 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-08-04 07:31:47,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 166 flow [2023-08-04 07:31:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:31:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:31:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-04 07:31:47,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559006211180124 [2023-08-04 07:31:47,995 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-04 07:31:47,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-04 07:31:47,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:47,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-04 07:31:47,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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 07:31:47,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 07:31:47,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 07:31:47,997 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 90 flow. Second operand 4 states and 358 transitions. [2023-08-04 07:31:47,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 166 flow [2023-08-04 07:31:47,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:31:47,999 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 102 flow [2023-08-04 07:31:47,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-04 07:31:47,999 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-04 07:31:47,999 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 102 flow [2023-08-04 07:31:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 07:31:48,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:48,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:48,007 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 07:31:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:48,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:48,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash 850280618, now seen corresponding path program 1 times [2023-08-04 07:31:48,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:48,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144899895] [2023-08-04 07:31:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:31:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144899895] [2023-08-04 07:31:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144899895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516115113] [2023-08-04 07:31:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:48,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:48,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:48,262 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) [2023-08-04 07:31:48,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:31:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:48,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:31:48,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:31:48,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:31:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:31:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516115113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:31:48,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:31:48,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:31:48,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127822243] [2023-08-04 07:31:48,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:31:48,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:31:48,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:31:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:31:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 07:31:48,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 07:31:48,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:48,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 07:31:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:48,497 INFO L124 PetriNetUnfolderBase]: 1216/1861 cut-off events. [2023-08-04 07:31:48,497 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 07:31:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1861 events. 1216/1861 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9168 event pairs, 400 based on Foata normal form. 27/1878 useless extension candidates. Maximal degree in co-relation 1421. Up to 943 conditions per place. [2023-08-04 07:31:48,505 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 34 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 07:31:48,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2023-08-04 07:31:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:31:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:31:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 07:31:48,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2023-08-04 07:31:48,507 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 07:31:48,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 07:31:48,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:48,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 07:31:48,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:31:48,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 07:31:48,509 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 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 07:31:48,509 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 102 flow. Second operand 4 states and 366 transitions. [2023-08-04 07:31:48,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2023-08-04 07:31:48,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:31:48,511 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 109 flow [2023-08-04 07:31:48,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 07:31:48,511 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 07:31:48,511 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 109 flow [2023-08-04 07:31:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 07:31:48,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:48,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:48,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:31:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:48,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:48,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1523788183, now seen corresponding path program 1 times [2023-08-04 07:31:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546981262] [2023-08-04 07:31:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:31:48,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546981262] [2023-08-04 07:31:48,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546981262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:31:48,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:31:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:31:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420570380] [2023-08-04 07:31:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:31:48,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:31:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:31:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:31:48,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 161 [2023-08-04 07:31:48,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 07:31:48,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:48,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 161 [2023-08-04 07:31:48,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:48,901 INFO L124 PetriNetUnfolderBase]: 872/1342 cut-off events. [2023-08-04 07:31:48,901 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-04 07:31:48,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3283 conditions, 1342 events. 872/1342 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5604 event pairs, 213 based on Foata normal form. 16/1353 useless extension candidates. Maximal degree in co-relation 2094. Up to 1109 conditions per place. [2023-08-04 07:31:48,907 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 35 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-04 07:31:48,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 268 flow [2023-08-04 07:31:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:31:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:31:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-04 07:31:48,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859213250517599 [2023-08-04 07:31:48,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-04 07:31:48,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-04 07:31:48,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:48,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-04 07:31:48,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 07:31:48,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:48,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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 07:31:48,910 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 109 flow. Second operand 3 states and 283 transitions. [2023-08-04 07:31:48,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 268 flow [2023-08-04 07:31:48,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 254 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:31:48,912 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 135 flow [2023-08-04 07:31:48,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-04 07:31:48,912 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 07:31:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 135 flow [2023-08-04 07:31:48,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 07:31:48,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 07:31:48,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:48,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -838954844, now seen corresponding path program 1 times [2023-08-04 07:31:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701797078] [2023-08-04 07:31:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:31:48,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701797078] [2023-08-04 07:31:48,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701797078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511582204] [2023-08-04 07:31:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:48,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:49,014 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) [2023-08-04 07:31:49,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 07:31:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:49,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 07:31:49,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:31:49,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:31:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:31:49,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511582204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:31:49,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:31:49,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-08-04 07:31:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913046532] [2023-08-04 07:31:49,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:31:49,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 07:31:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 07:31:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-04 07:31:49,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 161 [2023-08-04 07:31:49,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 11 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) [2023-08-04 07:31:49,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:49,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 161 [2023-08-04 07:31:49,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:31:49,911 INFO L124 PetriNetUnfolderBase]: 3274/4798 cut-off events. [2023-08-04 07:31:49,911 INFO L125 PetriNetUnfolderBase]: For 3936/3936 co-relation queries the response was YES. [2023-08-04 07:31:49,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12758 conditions, 4798 events. 3274/4798 cut-off events. For 3936/3936 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24649 event pairs, 170 based on Foata normal form. 258/5053 useless extension candidates. Maximal degree in co-relation 6606. Up to 1401 conditions per place. [2023-08-04 07:31:49,938 INFO L140 encePairwiseOnDemand]: 148/161 looper letters, 130 selfloop transitions, 99 changer transitions 0/231 dead transitions. [2023-08-04 07:31:49,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 231 transitions, 1292 flow [2023-08-04 07:31:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 07:31:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 07:31:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1464 transitions. [2023-08-04 07:31:49,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348922177566678 [2023-08-04 07:31:49,941 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1464 transitions. [2023-08-04 07:31:49,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1464 transitions. [2023-08-04 07:31:49,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:31:49,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1464 transitions. [2023-08-04 07:31:49,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.11764705882354) internal successors, (1464), 17 states have internal predecessors, (1464), 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 07:31:49,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 161.0) internal successors, (2898), 18 states have internal predecessors, (2898), 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 07:31:49,947 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 161.0) internal successors, (2898), 18 states have internal predecessors, (2898), 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 07:31:49,947 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 135 flow. Second operand 17 states and 1464 transitions. [2023-08-04 07:31:49,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 231 transitions, 1292 flow [2023-08-04 07:31:49,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 231 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:31:49,953 INFO L231 Difference]: Finished difference. Result has 69 places, 143 transitions, 870 flow [2023-08-04 07:31:49,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=870, PETRI_PLACES=69, PETRI_TRANSITIONS=143} [2023-08-04 07:31:49,954 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 34 predicate places. [2023-08-04 07:31:49,954 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 143 transitions, 870 flow [2023-08-04 07:31:49,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 11 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) [2023-08-04 07:31:49,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:49,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:49,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 07:31:50,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:50,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:50,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1152817034, now seen corresponding path program 1 times [2023-08-04 07:31:50,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:50,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764380181] [2023-08-04 07:31:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:31:50,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:31:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:31:50,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:31:50,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:31:50,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:31:50,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 07:31:50,204 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:31:50,204 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 07:31:50,205 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:31:50,206 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:31:50,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:31:50 BasicIcfg [2023-08-04 07:31:50,282 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:31:50,283 INFO L158 Benchmark]: Toolchain (without parser) took 9290.85ms. Allocated memory was 809.5MB in the beginning and 973.1MB in the end (delta: 163.6MB). Free memory was 756.4MB in the beginning and 484.7MB in the end (delta: 271.7MB). Peak memory consumption was 437.9MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,283 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 404.8MB. Free memory is still 353.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:31:50,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.46ms. Allocated memory is still 809.5MB. Free memory was 756.4MB in the beginning and 736.1MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,283 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.42ms. Allocated memory is still 809.5MB. Free memory was 736.1MB in the beginning and 734.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,283 INFO L158 Benchmark]: Boogie Preprocessor took 26.40ms. Allocated memory is still 809.5MB. Free memory was 734.0MB in the beginning and 732.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,283 INFO L158 Benchmark]: RCFGBuilder took 380.71ms. Allocated memory is still 809.5MB. Free memory was 732.5MB in the beginning and 719.3MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,284 INFO L158 Benchmark]: TraceAbstraction took 8548.70ms. Allocated memory was 809.5MB in the beginning and 973.1MB in the end (delta: 163.6MB). Free memory was 718.7MB in the beginning and 484.7MB in the end (delta: 234.0MB). Peak memory consumption was 400.1MB. Max. memory is 16.0GB. [2023-08-04 07:31:50,284 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 404.8MB. Free memory is still 353.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 284.46ms. Allocated memory is still 809.5MB. Free memory was 756.4MB in the beginning and 736.1MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.42ms. Allocated memory is still 809.5MB. Free memory was 736.1MB in the beginning and 734.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.40ms. Allocated memory is still 809.5MB. Free memory was 734.0MB in the beginning and 732.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 380.71ms. Allocated memory is still 809.5MB. Free memory was 732.5MB in the beginning and 719.3MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 8548.70ms. Allocated memory was 809.5MB in the beginning and 973.1MB in the end (delta: 163.6MB). Free memory was 718.7MB in the beginning and 484.7MB in the end (delta: 234.0MB). Peak memory consumption was 400.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 72 PlacesBefore, 21 PlacesAfterwards, 70 TransitionsBefore, 17 TransitionsAfterwards, 840 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 61 TotalNumberOfCompositions, 1422 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 746, independent: 689, independent conditional: 0, independent unconditional: 689, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 454, independent: 436, independent conditional: 0, independent unconditional: 436, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 746, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 454, unknown conditional: 0, unknown unconditional: 454] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0s, 60 PlacesBefore, 20 PlacesAfterwards, 56 TransitionsBefore, 15 TransitionsAfterwards, 492 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 45 TotalNumberOfCompositions, 916 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 548, independent: 502, independent conditional: 0, independent unconditional: 502, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 259, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 548, independent: 249, independent conditional: 0, independent unconditional: 249, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 259, unknown conditional: 0, unknown unconditional: 259] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 90 PlacesBefore, 35 PlacesAfterwards, 84 TransitionsBefore, 27 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 65 TotalNumberOfCompositions, 4193 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1906, independent: 1798, independent conditional: 0, independent unconditional: 1798, dependent: 108, dependent conditional: 0, dependent unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1016, independent: 988, independent conditional: 0, independent unconditional: 988, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1906, independent: 810, independent conditional: 0, independent unconditional: 810, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 1016, unknown conditional: 0, unknown unconditional: 1016] , Statistics on independence cache: Total cache size (in pairs): 85, Positive cache size: 74, Positive conditional cache size: 0, Positive unconditional cache size: 74, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p0_EAX = 0; [L712] 0 int __unbuffered_p1_EAX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L718] 0 int y = 0; [L764] 0 pthread_t t2625[2]; [L765] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=-3, t2625={5:0}, x=0, y=0] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L722] 1 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 1 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=-2, t2625={5:0}, x=0, y=1] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=1] [L722] 2 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 2 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] COND FALSE 0 !(asdf<2) [L766] 0 pthread_t t2626[2]; [L767] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=-1, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L732] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 1 return 0; [L732] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 2 return 0; [L767] COND FALSE 0 !(asdf<2) [L769] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L771] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) VAL [\old(cond)=1, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, cond=1, main$tmp_guard0=1, main$tmp_guard1=0, x=0, y=1] [L771] RET 0 assume_abort_if_not(main$tmp_guard0) [L775] 0 main$tmp_guard1 = !(__unbuffered_p0_EAX == 0 && __unbuffered_p1_EAX == 0) [L777] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=0, y=1] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 2 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 78 SizeOfPredicates, 0 NumberOfNonLiveVariables, 209 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.7s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 284 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 240 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 652 IncrementalHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 19 mSDtfsCounter, 652 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=870occurred in iteration=6, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 761 SizeOfPredicates, 1 NumberOfNonLiveVariables, 510 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 54/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 28 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 07:31:50,304 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 Received shutdown request...