/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:59:01,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:59:01,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:59:01,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:59:01,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:59:01,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:59:01,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:59:01,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:59:01,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:59:01,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:59:01,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:59:01,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:59:01,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:59:01,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:59:01,359 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:59:01,359 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:59:01,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:59:01,360 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:59:01,360 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:59:01,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:59:01,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:59:01,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:59:01,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:59:01,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:59:01,362 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:59:01,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:59:01,362 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:59:01,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:59:01,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:59:01,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:59:01,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:59:01,364 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:59:01,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:59:01,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:59:01,366 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:59:01,366 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:59:01,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:59:01,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:59:01,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:59:01,626 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:59:01,627 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:59:01,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c [2023-08-03 20:59:02,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:59:02,996 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:59:02,997 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c [2023-08-03 20:59:03,004 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9707d5f03/535dc1e24feb41beaf0477d13684e14d/FLAGa1ee29903 [2023-08-03 20:59:03,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9707d5f03/535dc1e24feb41beaf0477d13684e14d [2023-08-03 20:59:03,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:59:03,021 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:59:03,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:59:03,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:59:03,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:59:03,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bca149a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03, skipping insertion in model container [2023-08-03 20:59:03,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,053 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:59:03,193 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c[2600,2613] [2023-08-03 20:59:03,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:59:03,207 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:59:03,226 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c[2600,2613] [2023-08-03 20:59:03,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:59:03,236 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:59:03,237 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:59:03,242 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:59:03,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03 WrapperNode [2023-08-03 20:59:03,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:59:03,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:59:03,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:59:03,243 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:59:03,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,277 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 165 [2023-08-03 20:59:03,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:59:03,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:59:03,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:59:03,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:59:03,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:59:03,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:59:03,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:59:03,304 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:59:03,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (1/1) ... [2023-08-03 20:59:03,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:59:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:03,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 20:59:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 20:59:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:59:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:59:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:59:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:59:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:59:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:59:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:59:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:59:03,364 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:59:03,458 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:59:03,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:59:03,821 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:59:03,917 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:59:03,917 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 20:59:03,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:59:03 BoogieIcfgContainer [2023-08-03 20:59:03,920 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:59:03,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:59:03,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:59:03,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:59:03,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:59:03" (1/3) ... [2023-08-03 20:59:03,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34859502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:59:03, skipping insertion in model container [2023-08-03 20:59:03,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:59:03" (2/3) ... [2023-08-03 20:59:03,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34859502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:59:03, skipping insertion in model container [2023-08-03 20:59:03,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:59:03" (3/3) ... [2023-08-03 20:59:03,930 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-simple-queue.wvr_bound2.c [2023-08-03 20:59:03,939 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:59:03,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:59:03,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:59:03,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:59:03,994 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:59:04,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,105 INFO L124 PetriNetUnfolderBase]: 36/284 cut-off events. [2023-08-03 20:59:04,106 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:59:04,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 284 events. 36/284 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 822 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 20:59:04,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:59:04,128 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 312 flow [2023-08-03 20:59:04,185 INFO L124 PetriNetUnfolderBase]: 36/284 cut-off events. [2023-08-03 20:59:04,186 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:59:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 284 events. 36/284 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 822 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 20:59:04,194 INFO L119 LiptonReduction]: Number of co-enabled transitions 2142 [2023-08-03 20:59:07,918 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-08-03 20:59:07,918 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-03 20:59:07,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:59:07,936 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;@3b87f8f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:59:07,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:59:07,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:59:07,942 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-03 20:59:07,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:59:07,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:07,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:59:07,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:07,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1123550496, now seen corresponding path program 1 times [2023-08-03 20:59:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891233399] [2023-08-03 20:59:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:59:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:08,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891233399] [2023-08-03 20:59:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891233399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:08,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:59:08,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234379578] [2023-08-03 20:59:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:08,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:59:08,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 281 [2023-08-03 20:59:08,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:08,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:08,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 281 [2023-08-03 20:59:08,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:08,286 INFO L124 PetriNetUnfolderBase]: 109/205 cut-off events. [2023-08-03 20:59:08,286 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-03 20:59:08,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 205 events. 109/205 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 600 event pairs, 21 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 308. Up to 185 conditions per place. [2023-08-03 20:59:08,289 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 20:59:08,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 142 flow [2023-08-03 20:59:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-03 20:59:08,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697508896797153 [2023-08-03 20:59:08,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-03 20:59:08,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-03 20:59:08,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:08,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-03 20:59:08,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:08,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:08,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:08,320 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 82 flow. Second operand 3 states and 396 transitions. [2023-08-03 20:59:08,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 142 flow [2023-08-03 20:59:08,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:59:08,325 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 88 flow [2023-08-03 20:59:08,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-08-03 20:59:08,330 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-03 20:59:08,330 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 88 flow [2023-08-03 20:59:08,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:08,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:08,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:59:08,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:59:08,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:08,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 498726709, now seen corresponding path program 1 times [2023-08-03 20:59:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:08,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829100528] [2023-08-03 20:59:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:59:08,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:59:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:59:08,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:59:08,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:59:08,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:59:08,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:59:08,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:59:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:59:08,441 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:59:08,444 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:59:08,444 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:59:08,467 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:59:08,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,587 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-03 20:59:08,588 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:59:08,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-03 20:59:08,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:59:08,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,598 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:59:08,687 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-03 20:59:08,687 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:59:08,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-03 20:59:08,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 5292 [2023-08-03 20:59:12,247 INFO L134 LiptonReduction]: Checked pairs total: 7792 [2023-08-03 20:59:12,247 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-03 20:59:12,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:59:12,251 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;@3b87f8f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:59:12,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:59:12,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:59:12,254 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-03 20:59:12,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:59:12,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:12,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:59:12,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:12,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:12,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1555432374, now seen corresponding path program 1 times [2023-08-03 20:59:12,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:12,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471667320] [2023-08-03 20:59:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:12,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:59:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471667320] [2023-08-03 20:59:12,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471667320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:12,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:12,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:59:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394769746] [2023-08-03 20:59:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:59:12,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 20:59:12,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:12,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 20:59:12,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:12,597 INFO L124 PetriNetUnfolderBase]: 1951/2778 cut-off events. [2023-08-03 20:59:12,597 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-03 20:59:12,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5711 conditions, 2778 events. 1951/2778 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10364 event pairs, 641 based on Foata normal form. 0/1663 useless extension candidates. Maximal degree in co-relation 2130. Up to 2623 conditions per place. [2023-08-03 20:59:12,616 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 37 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 20:59:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 216 flow [2023-08-03 20:59:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-03 20:59:12,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633642930856553 [2023-08-03 20:59:12,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-03 20:59:12,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-03 20:59:12,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:12,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-03 20:59:12,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,629 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 132 flow. Second operand 3 states and 449 transitions. [2023-08-03 20:59:12,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 216 flow [2023-08-03 20:59:12,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:59:12,632 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 142 flow [2023-08-03 20:59:12,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2023-08-03 20:59:12,633 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-03 20:59:12,633 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 142 flow [2023-08-03 20:59:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:12,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:59:12,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:12,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 191786047, now seen corresponding path program 1 times [2023-08-03 20:59:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539227937] [2023-08-03 20:59:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:59:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539227937] [2023-08-03 20:59:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539227937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:59:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921793924] [2023-08-03 20:59:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:59:12,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 20:59:12,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:12,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 20:59:12,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:12,931 INFO L124 PetriNetUnfolderBase]: 1945/2786 cut-off events. [2023-08-03 20:59:12,932 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2023-08-03 20:59:12,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 2786 events. 1945/2786 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10497 event pairs, 644 based on Foata normal form. 0/1684 useless extension candidates. Maximal degree in co-relation 5696. Up to 2552 conditions per place. [2023-08-03 20:59:12,948 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 42 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-03 20:59:12,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 246 flow [2023-08-03 20:59:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-03 20:59:12,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664602683178535 [2023-08-03 20:59:12,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-03 20:59:12,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-03 20:59:12,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:12,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-03 20:59:12,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,954 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 142 flow. Second operand 3 states and 452 transitions. [2023-08-03 20:59:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 246 flow [2023-08-03 20:59:12,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:12,957 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 152 flow [2023-08-03 20:59:12,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-08-03 20:59:12,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-03 20:59:12,958 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 152 flow [2023-08-03 20:59:12,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:12,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:12,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:59:12,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:59:12,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:12,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash 831846535, now seen corresponding path program 1 times [2023-08-03 20:59:12,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:12,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249749268] [2023-08-03 20:59:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:59:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249749268] [2023-08-03 20:59:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249749268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892189762] [2023-08-03 20:59:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:13,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:13,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:13,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:13,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:59:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:13,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:59:13,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:59:13,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:59:13,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892189762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:13,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:59:13,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:59:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405323846] [2023-08-03 20:59:13,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:13,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:59:13,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:13,451 INFO L124 PetriNetUnfolderBase]: 1937/2772 cut-off events. [2023-08-03 20:59:13,451 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-03 20:59:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5789 conditions, 2772 events. 1937/2772 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10364 event pairs, 427 based on Foata normal form. 4/1714 useless extension candidates. Maximal degree in co-relation 2161. Up to 2584 conditions per place. [2023-08-03 20:59:13,467 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 41 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-03 20:59:13,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 257 flow [2023-08-03 20:59:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:59:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:59:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-08-03 20:59:13,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458204334365325 [2023-08-03 20:59:13,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-08-03 20:59:13,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-08-03 20:59:13,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:13,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-08-03 20:59:13,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,476 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,476 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 152 flow. Second operand 5 states and 720 transitions. [2023-08-03 20:59:13,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 257 flow [2023-08-03 20:59:13,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:59:13,479 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 161 flow [2023-08-03 20:59:13,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-03 20:59:13,480 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-03 20:59:13,480 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 161 flow [2023-08-03 20:59:13,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:13,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:13,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:13,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:13,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 448673163, now seen corresponding path program 1 times [2023-08-03 20:59:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144494270] [2023-08-03 20:59:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:59:13,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144494270] [2023-08-03 20:59:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144494270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124074332] [2023-08-03 20:59:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:13,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:13,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:13,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:59:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:13,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:59:13,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:59:13,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:59:13,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124074332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:13,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:59:13,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:59:13,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818020367] [2023-08-03 20:59:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:13,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:13,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 20:59:13,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:13,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:13,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 20:59:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:14,088 INFO L124 PetriNetUnfolderBase]: 1781/2592 cut-off events. [2023-08-03 20:59:14,089 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2023-08-03 20:59:14,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5392 conditions, 2592 events. 1781/2592 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9795 event pairs, 616 based on Foata normal form. 0/1628 useless extension candidates. Maximal degree in co-relation 2318. Up to 1926 conditions per place. [2023-08-03 20:59:14,104 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 50 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 20:59:14,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 303 flow [2023-08-03 20:59:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-03 20:59:14,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726522187822497 [2023-08-03 20:59:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-03 20:59:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-03 20:59:14,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:14,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-03 20:59:14,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,110 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 161 flow. Second operand 3 states and 458 transitions. [2023-08-03 20:59:14,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 303 flow [2023-08-03 20:59:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:59:14,113 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 166 flow [2023-08-03 20:59:14,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-08-03 20:59:14,116 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-03 20:59:14,116 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 166 flow [2023-08-03 20:59:14,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:14,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:14,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:14,323 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,SelfDestructingSolverStorable5 [2023-08-03 20:59:14,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:14,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1663054033, now seen corresponding path program 1 times [2023-08-03 20:59:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564324565] [2023-08-03 20:59:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:14,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:14,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564324565] [2023-08-03 20:59:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564324565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394291358] [2023-08-03 20:59:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:14,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:14,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:14,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:59:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:14,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:59:14,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:14,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394291358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:14,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:59:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465417838] [2023-08-03 20:59:14,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:14,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:14,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:14,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:14,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:14,737 INFO L124 PetriNetUnfolderBase]: 1587/2300 cut-off events. [2023-08-03 20:59:14,737 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 20:59:14,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 2300 events. 1587/2300 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8327 event pairs, 370 based on Foata normal form. 2/1497 useless extension candidates. Maximal degree in co-relation 2111. Up to 2145 conditions per place. [2023-08-03 20:59:14,751 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 42 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 20:59:14,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 264 flow [2023-08-03 20:59:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-03 20:59:14,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4520123839009288 [2023-08-03 20:59:14,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-03 20:59:14,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-03 20:59:14,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:14,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-03 20:59:14,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,758 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 166 flow. Second operand 4 states and 584 transitions. [2023-08-03 20:59:14,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 264 flow [2023-08-03 20:59:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:14,761 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 162 flow [2023-08-03 20:59:14,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-03 20:59:14,761 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2023-08-03 20:59:14,761 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 162 flow [2023-08-03 20:59:14,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:14,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:14,762 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:14,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:14,969 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 [2023-08-03 20:59:14,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:14,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2112786597, now seen corresponding path program 1 times [2023-08-03 20:59:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:14,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510492980] [2023-08-03 20:59:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:59:15,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510492980] [2023-08-03 20:59:15,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510492980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213498767] [2023-08-03 20:59:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:15,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:59:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:15,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:59:15,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:59:15,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:59:15,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213498767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:15,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:59:15,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:59:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707981008] [2023-08-03 20:59:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:15,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:15,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:59:15,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:15,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:15,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:15,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:15,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:15,415 INFO L124 PetriNetUnfolderBase]: 1523/2212 cut-off events. [2023-08-03 20:59:15,416 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-03 20:59:15,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 2212 events. 1523/2212 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7961 event pairs, 44 based on Foata normal form. 16/1455 useless extension candidates. Maximal degree in co-relation 2676. Up to 1862 conditions per place. [2023-08-03 20:59:15,429 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 54 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-03 20:59:15,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 316 flow [2023-08-03 20:59:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:59:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:59:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-08-03 20:59:15,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45325077399380803 [2023-08-03 20:59:15,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-08-03 20:59:15,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-08-03 20:59:15,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:15,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-08-03 20:59:15,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:15,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:15,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:15,436 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 162 flow. Second operand 5 states and 732 transitions. [2023-08-03 20:59:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 316 flow [2023-08-03 20:59:15,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:59:15,439 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 167 flow [2023-08-03 20:59:15,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-03 20:59:15,440 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2023-08-03 20:59:15,440 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 167 flow [2023-08-03 20:59:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:15,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:15,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:15,646 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 [2023-08-03 20:59:15,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:15,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1746289585, now seen corresponding path program 1 times [2023-08-03 20:59:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:15,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289586491] [2023-08-03 20:59:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:59:15,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:15,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289586491] [2023-08-03 20:59:15,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289586491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:15,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104581807] [2023-08-03 20:59:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:15,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:15,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:15,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:15,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:59:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:15,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:59:15,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:15,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:59:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104581807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:59:15,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:59:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275135580] [2023-08-03 20:59:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:15,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 20:59:15,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 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) [2023-08-03 20:59:15,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:15,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 20:59:15,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:16,006 INFO L124 PetriNetUnfolderBase]: 1542/2283 cut-off events. [2023-08-03 20:59:16,006 INFO L125 PetriNetUnfolderBase]: For 481/481 co-relation queries the response was YES. [2023-08-03 20:59:16,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4918 conditions, 2283 events. 1542/2283 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8492 event pairs, 556 based on Foata normal form. 0/1530 useless extension candidates. Maximal degree in co-relation 2843. Up to 1584 conditions per place. [2023-08-03 20:59:16,019 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 51 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 20:59:16,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 309 flow [2023-08-03 20:59:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-03 20:59:16,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726522187822497 [2023-08-03 20:59:16,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-03 20:59:16,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-03 20:59:16,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:16,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-03 20:59:16,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,025 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 167 flow. Second operand 3 states and 458 transitions. [2023-08-03 20:59:16,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 309 flow [2023-08-03 20:59:16,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:59:16,027 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 172 flow [2023-08-03 20:59:16,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-03 20:59:16,028 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-08-03 20:59:16,028 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 172 flow [2023-08-03 20:59:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 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) [2023-08-03 20:59:16,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:16,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:16,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:16,233 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 [2023-08-03 20:59:16,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:16,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash -617427346, now seen corresponding path program 1 times [2023-08-03 20:59:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:16,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406223935] [2023-08-03 20:59:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406223935] [2023-08-03 20:59:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406223935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180989342] [2023-08-03 20:59:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:16,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:16,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:59:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:16,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:59:16,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:16,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:59:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180989342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:16,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:59:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901390003] [2023-08-03 20:59:16,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:16,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:16,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:16,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:16,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:16,697 INFO L124 PetriNetUnfolderBase]: 1458/2159 cut-off events. [2023-08-03 20:59:16,697 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-08-03 20:59:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 2159 events. 1458/2159 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7678 event pairs, 356 based on Foata normal form. 8/1483 useless extension candidates. Maximal degree in co-relation 2823. Up to 1850 conditions per place. [2023-08-03 20:59:16,707 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 51 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 20:59:16,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 304 flow [2023-08-03 20:59:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-03 20:59:16,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582043343653251 [2023-08-03 20:59:16,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-03 20:59:16,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-03 20:59:16,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:16,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-03 20:59:16,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,713 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 172 flow. Second operand 4 states and 592 transitions. [2023-08-03 20:59:16,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 304 flow [2023-08-03 20:59:16,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:16,718 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 168 flow [2023-08-03 20:59:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-03 20:59:16,719 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-03 20:59:16,719 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 168 flow [2023-08-03 20:59:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:16,720 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, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:16,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:16,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:16,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1723307047, now seen corresponding path program 1 times [2023-08-03 20:59:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360002844] [2023-08-03 20:59:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:59:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360002844] [2023-08-03 20:59:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360002844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418840146] [2023-08-03 20:59:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:16,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:16,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:17,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:59:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:17,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:59:17,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:59:17,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:59:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418840146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:17,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:17,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:59:17,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301810840] [2023-08-03 20:59:17,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:17,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:17,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:17,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:17,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:17,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:17,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:17,299 INFO L124 PetriNetUnfolderBase]: 1018/1519 cut-off events. [2023-08-03 20:59:17,299 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 20:59:17,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3375 conditions, 1519 events. 1018/1519 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4803 event pairs, 215 based on Foata normal form. 32/1063 useless extension candidates. Maximal degree in co-relation 2711. Up to 665 conditions per place. [2023-08-03 20:59:17,307 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 57 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-03 20:59:17,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 342 flow [2023-08-03 20:59:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-03 20:59:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46362229102167185 [2023-08-03 20:59:17,310 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:17,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,313 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,313 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 168 flow. Second operand 4 states and 599 transitions. [2023-08-03 20:59:17,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 342 flow [2023-08-03 20:59:17,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:59:17,316 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 182 flow [2023-08-03 20:59:17,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-08-03 20:59:17,317 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-03 20:59:17,317 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 182 flow [2023-08-03 20:59:17,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:17,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:17,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 20:59:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:17,523 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:17,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 699345121, now seen corresponding path program 1 times [2023-08-03 20:59:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132047928] [2023-08-03 20:59:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:59:17,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132047928] [2023-08-03 20:59:17,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132047928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19584151] [2023-08-03 20:59:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:17,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:17,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:17,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:59:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:17,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:59:17,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:59:17,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:59:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19584151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:17,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:59:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450866636] [2023-08-03 20:59:17,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:59:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:59:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:59:17,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-03 20:59:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-03 20:59:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:17,888 INFO L124 PetriNetUnfolderBase]: 1010/1504 cut-off events. [2023-08-03 20:59:17,888 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-03 20:59:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1504 events. 1010/1504 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4717 event pairs, 439 based on Foata normal form. 9/1029 useless extension candidates. Maximal degree in co-relation 2927. Up to 1162 conditions per place. [2023-08-03 20:59:17,896 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 57 selfloop transitions, 3 changer transitions 2/66 dead transitions. [2023-08-03 20:59:17,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 358 flow [2023-08-03 20:59:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-03 20:59:17,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46362229102167185 [2023-08-03 20:59:17,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:17,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-03 20:59:17,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,903 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 182 flow. Second operand 4 states and 599 transitions. [2023-08-03 20:59:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 358 flow [2023-08-03 20:59:17,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:17,907 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 186 flow [2023-08-03 20:59:17,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-03 20:59:17,907 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-03 20:59:17,907 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 186 flow [2023-08-03 20:59:17,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:17,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:17,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:17,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 20:59:18,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:18,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1358563104, now seen corresponding path program 1 times [2023-08-03 20:59:18,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632621688] [2023-08-03 20:59:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:18,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:59:18,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:18,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632621688] [2023-08-03 20:59:18,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632621688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:18,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:18,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 20:59:18,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191842515] [2023-08-03 20:59:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:59:18,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 323 [2023-08-03 20:59:18,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:18,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 323 [2023-08-03 20:59:18,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:18,494 INFO L124 PetriNetUnfolderBase]: 1758/2541 cut-off events. [2023-08-03 20:59:18,494 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-03 20:59:18,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 2541 events. 1758/2541 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8968 event pairs, 533 based on Foata normal form. 1/1686 useless extension candidates. Maximal degree in co-relation 5815. Up to 1369 conditions per place. [2023-08-03 20:59:18,507 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 63 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-03 20:59:18,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 445 flow [2023-08-03 20:59:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-03 20:59:18,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-08-03 20:59:18,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-03 20:59:18,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-03 20:59:18,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:18,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-03 20:59:18,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,514 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 186 flow. Second operand 3 states and 475 transitions. [2023-08-03 20:59:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 445 flow [2023-08-03 20:59:18,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 429 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:59:18,522 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 197 flow [2023-08-03 20:59:18,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-03 20:59:18,522 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-03 20:59:18,522 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 197 flow [2023-08-03 20:59:18,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:18,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:18,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:59:18,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:18,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1317744202, now seen corresponding path program 1 times [2023-08-03 20:59:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:18,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956510399] [2023-08-03 20:59:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:59:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956510399] [2023-08-03 20:59:18,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956510399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:18,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:18,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:59:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755724595] [2023-08-03 20:59:18,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:18,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:59:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:59:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:59:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 20:59:18,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:18,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:18,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 20:59:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:19,024 INFO L124 PetriNetUnfolderBase]: 2453/3549 cut-off events. [2023-08-03 20:59:19,024 INFO L125 PetriNetUnfolderBase]: For 2275/2275 co-relation queries the response was YES. [2023-08-03 20:59:19,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9095 conditions, 3549 events. 2453/3549 cut-off events. For 2275/2275 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 14642 event pairs, 565 based on Foata normal form. 202/3066 useless extension candidates. Maximal degree in co-relation 8764. Up to 2625 conditions per place. [2023-08-03 20:59:19,043 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 64 selfloop transitions, 3 changer transitions 6/77 dead transitions. [2023-08-03 20:59:19,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 490 flow [2023-08-03 20:59:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:59:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:59:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-03 20:59:19,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48813209494324045 [2023-08-03 20:59:19,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-03 20:59:19,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-03 20:59:19,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:19,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-03 20:59:19,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,048 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 197 flow. Second operand 3 states and 473 transitions. [2023-08-03 20:59:19,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 490 flow [2023-08-03 20:59:19,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:19,055 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 215 flow [2023-08-03 20:59:19,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-03 20:59:19,055 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-03 20:59:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 215 flow [2023-08-03 20:59:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:19,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:59:19,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:19,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1549059641, now seen corresponding path program 1 times [2023-08-03 20:59:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894428532] [2023-08-03 20:59:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:59:19,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:19,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894428532] [2023-08-03 20:59:19,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894428532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:59:19,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:59:19,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:59:19,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734856852] [2023-08-03 20:59:19,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:59:19,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:59:19,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:59:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:59:19,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 323 [2023-08-03 20:59:19,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:19,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 323 [2023-08-03 20:59:19,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:19,633 INFO L124 PetriNetUnfolderBase]: 2916/4525 cut-off events. [2023-08-03 20:59:19,633 INFO L125 PetriNetUnfolderBase]: For 3403/3403 co-relation queries the response was YES. [2023-08-03 20:59:19,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12297 conditions, 4525 events. 2916/4525 cut-off events. For 3403/3403 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 20760 event pairs, 1984 based on Foata normal form. 233/4753 useless extension candidates. Maximal degree in co-relation 11863. Up to 3420 conditions per place. [2023-08-03 20:59:19,656 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 42 selfloop transitions, 2 changer transitions 32/80 dead transitions. [2023-08-03 20:59:19,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 521 flow [2023-08-03 20:59:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-08-03 20:59:19,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46594427244582043 [2023-08-03 20:59:19,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-08-03 20:59:19,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-08-03 20:59:19,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:19,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-08-03 20:59:19,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,662 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 215 flow. Second operand 4 states and 602 transitions. [2023-08-03 20:59:19,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 521 flow [2023-08-03 20:59:19,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:59:19,676 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 228 flow [2023-08-03 20:59:19,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-08-03 20:59:19,677 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-08-03 20:59:19,677 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 228 flow [2023-08-03 20:59:19,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:19,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:19,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:19,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 20:59:19,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:19,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 608571033, now seen corresponding path program 1 times [2023-08-03 20:59:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:19,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571428815] [2023-08-03 20:59:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:59:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571428815] [2023-08-03 20:59:20,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571428815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622938271] [2023-08-03 20:59:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:20,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:20,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:59:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:20,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-03 20:59:20,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:20,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 20:59:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:20,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 20:59:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-03 20:59:20,735 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:59:20,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-03 20:59:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:59:20,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:20,819 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_389) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2023-08-03 20:59:20,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:59:20,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-03 20:59:20,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-03 20:59:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 11 not checked. [2023-08-03 20:59:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622938271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:21,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:21,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-03 20:59:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246434941] [2023-08-03 20:59:21,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:21,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 20:59:21,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 20:59:21,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=195, Unknown=1, NotChecked=28, Total=272 [2023-08-03 20:59:21,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 323 [2023-08-03 20:59:21,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 228 flow. Second operand has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:21,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:21,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 323 [2023-08-03 20:59:21,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:21,898 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_389) c_~queue~0.base) .cse0) 5)) (= (select (select |c_#memory_int| c_~queue~0.base) .cse0) 5))) is different from false [2023-08-03 20:59:23,649 INFO L124 PetriNetUnfolderBase]: 14176/20116 cut-off events. [2023-08-03 20:59:23,650 INFO L125 PetriNetUnfolderBase]: For 17361/17361 co-relation queries the response was YES. [2023-08-03 20:59:23,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56491 conditions, 20116 events. 14176/20116 cut-off events. For 17361/17361 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 108818 event pairs, 2163 based on Foata normal form. 3/20114 useless extension candidates. Maximal degree in co-relation 56463. Up to 5167 conditions per place. [2023-08-03 20:59:23,819 INFO L140 encePairwiseOnDemand]: 293/323 looper letters, 326 selfloop transitions, 109 changer transitions 22/461 dead transitions. [2023-08-03 20:59:23,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 461 transitions, 3082 flow [2023-08-03 20:59:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-03 20:59:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-03 20:59:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2401 transitions. [2023-08-03 20:59:23,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912335017109337 [2023-08-03 20:59:23,826 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2401 transitions. [2023-08-03 20:59:23,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2401 transitions. [2023-08-03 20:59:23,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:23,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2401 transitions. [2023-08-03 20:59:23,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.36842105263158) internal successors, (2401), 19 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:23,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:23,840 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:23,840 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 228 flow. Second operand 19 states and 2401 transitions. [2023-08-03 20:59:23,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 461 transitions, 3082 flow [2023-08-03 20:59:23,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 461 transitions, 3066 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-03 20:59:23,930 INFO L231 Difference]: Finished difference. Result has 87 places, 157 transitions, 1255 flow [2023-08-03 20:59:23,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1255, PETRI_PLACES=87, PETRI_TRANSITIONS=157} [2023-08-03 20:59:23,931 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-08-03 20:59:23,931 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 157 transitions, 1255 flow [2023-08-03 20:59:23,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:23,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:23,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:23,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:24,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 20:59:24,139 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:24,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash -308484419, now seen corresponding path program 1 times [2023-08-03 20:59:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:24,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536483392] [2023-08-03 20:59:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:24,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 20:59:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:24,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536483392] [2023-08-03 20:59:24,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536483392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:24,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253256486] [2023-08-03 20:59:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:24,902 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:24,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:59:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:25,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-03 20:59:25,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:25,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-03 20:59:25,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-03 20:59:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:25,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:25,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:25,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:25,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:25,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:59:25,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:25,547 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_433 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_433) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2023-08-03 20:59:25,796 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:59:25,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-08-03 20:59:25,812 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:59:25,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-08-03 20:59:25,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-03 20:59:25,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-03 20:59:25,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-03 20:59:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 10 not checked. [2023-08-03 20:59:25,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253256486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:25,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:25,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-08-03 20:59:25,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051630450] [2023-08-03 20:59:25,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:25,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-03 20:59:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:25,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-03 20:59:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=337, Unknown=7, NotChecked=38, Total=462 [2023-08-03 20:59:25,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-03 20:59:25,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 157 transitions, 1255 flow. Second operand has 22 states, 22 states have (on average 106.36363636363636) internal successors, (2340), 22 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:25,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:25,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-03 20:59:25,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:28,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 20:59:35,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 20:59:37,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 20:59:39,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 20:59:39,701 INFO L124 PetriNetUnfolderBase]: 26184/37164 cut-off events. [2023-08-03 20:59:39,702 INFO L125 PetriNetUnfolderBase]: For 150054/150278 co-relation queries the response was YES. [2023-08-03 20:59:40,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191936 conditions, 37164 events. 26184/37164 cut-off events. For 150054/150278 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 218212 event pairs, 3633 based on Foata normal form. 110/37273 useless extension candidates. Maximal degree in co-relation 186091. Up to 25503 conditions per place. [2023-08-03 20:59:40,171 INFO L140 encePairwiseOnDemand]: 310/323 looper letters, 545 selfloop transitions, 96 changer transitions 28/673 dead transitions. [2023-08-03 20:59:40,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 673 transitions, 7177 flow [2023-08-03 20:59:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-03 20:59:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-03 20:59:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2879 transitions. [2023-08-03 20:59:40,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37138802889576883 [2023-08-03 20:59:40,179 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2879 transitions. [2023-08-03 20:59:40,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2879 transitions. [2023-08-03 20:59:40,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:40,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2879 transitions. [2023-08-03 20:59:40,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.95833333333333) internal successors, (2879), 24 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:40,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 323.0) internal successors, (8075), 25 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:40,196 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 323.0) internal successors, (8075), 25 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:40,196 INFO L175 Difference]: Start difference. First operand has 87 places, 157 transitions, 1255 flow. Second operand 24 states and 2879 transitions. [2023-08-03 20:59:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 673 transitions, 7177 flow [2023-08-03 20:59:40,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 673 transitions, 7061 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-03 20:59:40,969 INFO L231 Difference]: Finished difference. Result has 118 places, 216 transitions, 2034 flow [2023-08-03 20:59:40,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2034, PETRI_PLACES=118, PETRI_TRANSITIONS=216} [2023-08-03 20:59:40,969 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-03 20:59:40,969 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 216 transitions, 2034 flow [2023-08-03 20:59:40,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 106.36363636363636) internal successors, (2340), 22 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:40,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:40,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:40,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-03 20:59:41,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 20:59:41,176 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:41,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 820435535, now seen corresponding path program 2 times [2023-08-03 20:59:41,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:41,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364428735] [2023-08-03 20:59:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:41,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:59:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364428735] [2023-08-03 20:59:41,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364428735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435248962] [2023-08-03 20:59:41,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:59:41,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:41,318 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:41,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:59:41,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:59:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:59:41,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 20:59:41,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:59:41,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:59:41,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435248962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:41,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:41,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-08-03 20:59:41,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097194547] [2023-08-03 20:59:41,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:59:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:59:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:59:41,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 323 [2023-08-03 20:59:41,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 216 transitions, 2034 flow. Second operand has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:41,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:41,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 323 [2023-08-03 20:59:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:59:47,082 INFO L124 PetriNetUnfolderBase]: 31966/46001 cut-off events. [2023-08-03 20:59:47,082 INFO L125 PetriNetUnfolderBase]: For 342568/343918 co-relation queries the response was YES. [2023-08-03 20:59:47,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289206 conditions, 46001 events. 31966/46001 cut-off events. For 342568/343918 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 288253 event pairs, 7850 based on Foata normal form. 1282/47266 useless extension candidates. Maximal degree in co-relation 280588. Up to 33999 conditions per place. [2023-08-03 20:59:47,553 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 210 selfloop transitions, 65 changer transitions 13/292 dead transitions. [2023-08-03 20:59:47,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 292 transitions, 3504 flow [2023-08-03 20:59:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:59:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:59:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 633 transitions. [2023-08-03 20:59:47,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48993808049535603 [2023-08-03 20:59:47,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 633 transitions. [2023-08-03 20:59:47,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 633 transitions. [2023-08-03 20:59:47,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:59:47,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 633 transitions. [2023-08-03 20:59:47,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:47,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:47,559 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:47,559 INFO L175 Difference]: Start difference. First operand has 118 places, 216 transitions, 2034 flow. Second operand 4 states and 633 transitions. [2023-08-03 20:59:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 292 transitions, 3504 flow [2023-08-03 20:59:50,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 292 transitions, 3283 flow, removed 105 selfloop flow, removed 5 redundant places. [2023-08-03 20:59:50,240 INFO L231 Difference]: Finished difference. Result has 115 places, 208 transitions, 2241 flow [2023-08-03 20:59:50,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2241, PETRI_PLACES=115, PETRI_TRANSITIONS=208} [2023-08-03 20:59:50,241 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2023-08-03 20:59:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 208 transitions, 2241 flow [2023-08-03 20:59:50,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:50,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:59:50,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:59:50,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 20:59:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 20:59:50,442 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:59:50,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:59:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2103876066, now seen corresponding path program 2 times [2023-08-03 20:59:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:59:50,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761461345] [2023-08-03 20:59:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:59:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:59:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:59:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:59:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:59:51,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761461345] [2023-08-03 20:59:51,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761461345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:59:51,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369631190] [2023-08-03 20:59:51,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:59:51,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:59:51,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:59:51,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:59:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 20:59:52,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:59:52,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:59:52,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-03 20:59:52,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:59:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:52,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:52,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:52,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:59:52,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:59:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:59:52,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:59:52,506 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_516 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_516) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-03 20:59:54,658 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:59:54,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 142 [2023-08-03 20:59:54,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-03 20:59:54,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-03 20:59:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 10 not checked. [2023-08-03 20:59:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369631190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:59:54,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:59:54,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-03 20:59:54,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043267938] [2023-08-03 20:59:54,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:59:54,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 20:59:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:59:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 20:59:54,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=4, NotChecked=32, Total=342 [2023-08-03 20:59:54,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-03 20:59:54,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 208 transitions, 2241 flow. Second operand has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:59:54,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:59:54,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-03 20:59:54,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:00:03,428 INFO L124 PetriNetUnfolderBase]: 45369/65250 cut-off events. [2023-08-03 21:00:03,429 INFO L125 PetriNetUnfolderBase]: For 635954/636171 co-relation queries the response was YES. [2023-08-03 21:00:03,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442087 conditions, 65250 events. 45369/65250 cut-off events. For 635954/636171 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 425550 event pairs, 11701 based on Foata normal form. 67/65294 useless extension candidates. Maximal degree in co-relation 429377. Up to 48388 conditions per place. [2023-08-03 21:00:04,122 INFO L140 encePairwiseOnDemand]: 315/323 looper letters, 335 selfloop transitions, 96 changer transitions 21/456 dead transitions. [2023-08-03 21:00:04,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 456 transitions, 5881 flow [2023-08-03 21:00:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 21:00:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 21:00:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1227 transitions. [2023-08-03 21:00:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798761609907121 [2023-08-03 21:00:04,125 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1227 transitions. [2023-08-03 21:00:04,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1227 transitions. [2023-08-03 21:00:04,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:00:04,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1227 transitions. [2023-08-03 21:00:04,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.7) internal successors, (1227), 10 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:04,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:04,131 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:04,131 INFO L175 Difference]: Start difference. First operand has 115 places, 208 transitions, 2241 flow. Second operand 10 states and 1227 transitions. [2023-08-03 21:00:04,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 456 transitions, 5881 flow [2023-08-03 21:00:08,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 456 transitions, 5785 flow, removed 48 selfloop flow, removed 0 redundant places. [2023-08-03 21:00:08,009 INFO L231 Difference]: Finished difference. Result has 125 places, 238 transitions, 2913 flow [2023-08-03 21:00:08,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2913, PETRI_PLACES=125, PETRI_TRANSITIONS=238} [2023-08-03 21:00:08,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2023-08-03 21:00:08,009 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 238 transitions, 2913 flow [2023-08-03 21:00:08,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:08,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:00:08,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:00:08,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 21:00:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:00:08,210 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:00:08,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:00:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 215691459, now seen corresponding path program 3 times [2023-08-03 21:00:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:00:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582411846] [2023-08-03 21:00:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:00:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:00:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:00:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 21:00:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:00:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582411846] [2023-08-03 21:00:08,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582411846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:00:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167591288] [2023-08-03 21:00:08,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:00:08,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:00:08,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:00:08,354 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:00:08,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 21:00:08,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 21:00:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:00:08,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 21:00:08,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:00:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 21:00:08,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:00:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 21:00:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167591288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:00:08,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:00:08,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-03 21:00:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665160688] [2023-08-03 21:00:08,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:00:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:00:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:00:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:00:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-03 21:00:08,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 323 [2023-08-03 21:00:08,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 238 transitions, 2913 flow. Second operand has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:08,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:00:08,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 323 [2023-08-03 21:00:08,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:00:14,453 INFO L124 PetriNetUnfolderBase]: 30273/44925 cut-off events. [2023-08-03 21:00:14,453 INFO L125 PetriNetUnfolderBase]: For 414732/414816 co-relation queries the response was YES. [2023-08-03 21:00:14,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292317 conditions, 44925 events. 30273/44925 cut-off events. For 414732/414816 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 288533 event pairs, 16401 based on Foata normal form. 892/45805 useless extension candidates. Maximal degree in co-relation 292239. Up to 37734 conditions per place. [2023-08-03 21:00:14,921 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 149 selfloop transitions, 3 changer transitions 68/224 dead transitions. [2023-08-03 21:00:14,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 224 transitions, 3058 flow [2023-08-03 21:00:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:00:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:00:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 877 transitions. [2023-08-03 21:00:14,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252837977296184 [2023-08-03 21:00:14,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 877 transitions. [2023-08-03 21:00:14,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 877 transitions. [2023-08-03 21:00:14,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:00:14,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 877 transitions. [2023-08-03 21:00:14,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:14,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:14,928 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:14,929 INFO L175 Difference]: Start difference. First operand has 125 places, 238 transitions, 2913 flow. Second operand 6 states and 877 transitions. [2023-08-03 21:00:14,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 224 transitions, 3058 flow [2023-08-03 21:00:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 224 transitions, 2927 flow, removed 19 selfloop flow, removed 12 redundant places. [2023-08-03 21:00:17,297 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1838 flow [2023-08-03 21:00:17,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1838, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2023-08-03 21:00:17,298 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-08-03 21:00:17,299 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1838 flow [2023-08-03 21:00:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:17,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:00:17,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:00:17,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 21:00:17,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-03 21:00:17,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:00:17,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:00:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash 440640434, now seen corresponding path program 3 times [2023-08-03 21:00:17,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:00:17,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916502430] [2023-08-03 21:00:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:00:17,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:00:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:00:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 21:00:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:00:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916502430] [2023-08-03 21:00:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916502430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:00:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084029667] [2023-08-03 21:00:18,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:00:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:00:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:00:18,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:00:18,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 21:00:18,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-03 21:00:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:00:18,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-03 21:00:18,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:00:18,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-03 21:00:18,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-03 21:00:18,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:00:18,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 21:00:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:00:18,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 21:00:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:00:18,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 21:00:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 21:00:18,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:00:18,955 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_602 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_602) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2023-08-03 21:00:19,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:00:19,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-03 21:00:19,333 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:00:19,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 169 [2023-08-03 21:00:19,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-08-03 21:00:19,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-03 21:00:19,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-08-03 21:00:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 10 not checked. [2023-08-03 21:00:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084029667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:00:19,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:00:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 28 [2023-08-03 21:00:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46763879] [2023-08-03 21:00:19,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:00:19,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-03 21:00:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:00:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-03 21:00:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=4, NotChecked=54, Total=870 [2023-08-03 21:00:21,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:21,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-03 21:00:21,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1838 flow. Second operand has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:21,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:00:21,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-03 21:00:21,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:00:22,465 WARN L839 $PredicateComparison]: unable to prove that (and (= 5 c_~x~0) (forall ((v_ArrVal_600 (Array Int Int)) (v_ArrVal_602 (Array Int Int))) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_602) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4))))) is different from false [2023-08-03 21:00:25,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:27,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:29,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:31,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:33,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:36,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:38,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:40,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:42,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:45,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:00:56,132 INFO L124 PetriNetUnfolderBase]: 68800/98400 cut-off events. [2023-08-03 21:00:56,132 INFO L125 PetriNetUnfolderBase]: For 766439/767732 co-relation queries the response was YES. [2023-08-03 21:00:56,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654550 conditions, 98400 events. 68800/98400 cut-off events. For 766439/767732 co-relation queries the response was YES. Maximal size of possible extension queue 2219. Compared 669736 event pairs, 12341 based on Foata normal form. 85/98474 useless extension candidates. Maximal degree in co-relation 654501. Up to 74765 conditions per place. [2023-08-03 21:00:57,315 INFO L140 encePairwiseOnDemand]: 309/323 looper letters, 585 selfloop transitions, 217 changer transitions 30/836 dead transitions. [2023-08-03 21:00:57,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 836 transitions, 10853 flow [2023-08-03 21:00:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-03 21:00:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-03 21:00:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4112 transitions. [2023-08-03 21:00:57,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637328615656789 [2023-08-03 21:00:57,319 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4112 transitions. [2023-08-03 21:00:57,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4112 transitions. [2023-08-03 21:00:57,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:00:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4112 transitions. [2023-08-03 21:00:57,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 117.48571428571428) internal successors, (4112), 35 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:57,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 323.0) internal successors, (11628), 36 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:57,334 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 323.0) internal successors, (11628), 36 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:00:57,335 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1838 flow. Second operand 35 states and 4112 transitions. [2023-08-03 21:00:57,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 836 transitions, 10853 flow [2023-08-03 21:01:47,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 836 transitions, 10825 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-03 21:01:47,529 INFO L231 Difference]: Finished difference. Result has 152 places, 337 transitions, 5289 flow [2023-08-03 21:01:47,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5289, PETRI_PLACES=152, PETRI_TRANSITIONS=337} [2023-08-03 21:01:47,529 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2023-08-03 21:01:47,530 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 337 transitions, 5289 flow [2023-08-03 21:01:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:01:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:01:47,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:01:47,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-03 21:01:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:01:47,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:01:47,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:01:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1909410848, now seen corresponding path program 1 times [2023-08-03 21:01:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:01:47,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76460270] [2023-08-03 21:01:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:01:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:01:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:01:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 21:01:47,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:01:47,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76460270] [2023-08-03 21:01:47,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76460270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:01:47,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624620454] [2023-08-03 21:01:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:01:47,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:01:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:01:47,910 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:01:47,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 21:01:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:01:48,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 21:01:48,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:01:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 21:01:48,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:01:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 21:01:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624620454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:01:48,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:01:48,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2023-08-03 21:01:48,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569161585] [2023-08-03 21:01:48,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:01:48,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 21:01:48,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:01:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 21:01:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-03 21:01:48,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-03 21:01:48,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 337 transitions, 5289 flow. Second operand has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:01:48,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:01:48,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-03 21:01:48,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:02:13,470 INFO L124 PetriNetUnfolderBase]: 108987/155203 cut-off events. [2023-08-03 21:02:13,470 INFO L125 PetriNetUnfolderBase]: For 2091277/2095909 co-relation queries the response was YES. [2023-08-03 21:02:15,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232154 conditions, 155203 events. 108987/155203 cut-off events. For 2091277/2095909 co-relation queries the response was YES. Maximal size of possible extension queue 3532. Compared 1116154 event pairs, 21972 based on Foata normal form. 680/155843 useless extension candidates. Maximal degree in co-relation 1214033. Up to 118744 conditions per place. [2023-08-03 21:02:15,817 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 391 selfloop transitions, 205 changer transitions 0/600 dead transitions. [2023-08-03 21:02:15,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 600 transitions, 10476 flow [2023-08-03 21:02:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:02:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:02:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 808 transitions. [2023-08-03 21:02:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003095975232198 [2023-08-03 21:02:15,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 808 transitions. [2023-08-03 21:02:15,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 808 transitions. [2023-08-03 21:02:15,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:02:15,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 808 transitions. [2023-08-03 21:02:15,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:02:15,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:02:15,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:02:15,823 INFO L175 Difference]: Start difference. First operand has 152 places, 337 transitions, 5289 flow. Second operand 5 states and 808 transitions. [2023-08-03 21:02:15,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 600 transitions, 10476 flow [2023-08-03 21:03:05,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 600 transitions, 9424 flow, removed 521 selfloop flow, removed 3 redundant places. [2023-08-03 21:03:05,366 INFO L231 Difference]: Finished difference. Result has 156 places, 469 transitions, 7771 flow [2023-08-03 21:03:05,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7771, PETRI_PLACES=156, PETRI_TRANSITIONS=469} [2023-08-03 21:03:05,366 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-08-03 21:03:05,366 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 469 transitions, 7771 flow [2023-08-03 21:03:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:05,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:05,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:05,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 21:03:05,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:05,567 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:03:05,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1489585735, now seen corresponding path program 4 times [2023-08-03 21:03:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681634318] [2023-08-03 21:03:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 21:03:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681634318] [2023-08-03 21:03:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681634318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25771109] [2023-08-03 21:03:06,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 21:03:06,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:06,473 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:03:06,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 21:03:06,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 21:03:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:03:06,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-03 21:03:06,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:03:06,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 21:03:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:03:06,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 21:03:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:03:06,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 21:03:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:03:06,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:06,943 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_693 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_693) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-03 21:03:06,954 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_693 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_693) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-08-03 21:03:07,362 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:03:07,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 77 [2023-08-03 21:03:07,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-08-03 21:03:07,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-08-03 21:03:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 13 not checked. [2023-08-03 21:03:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25771109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:07,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2023-08-03 21:03:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189430949] [2023-08-03 21:03:07,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:07,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-03 21:03:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-03 21:03:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=490, Unknown=3, NotChecked=90, Total=650 [2023-08-03 21:03:07,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-03 21:03:07,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 469 transitions, 7771 flow. Second operand has 26 states, 26 states have (on average 104.8076923076923) internal successors, (2725), 26 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:07,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:07,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-03 21:03:07,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:47,349 INFO L124 PetriNetUnfolderBase]: 140426/197842 cut-off events. [2023-08-03 21:03:47,349 INFO L125 PetriNetUnfolderBase]: For 3191652/3193252 co-relation queries the response was YES. [2023-08-03 21:03:49,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622439 conditions, 197842 events. 140426/197842 cut-off events. For 3191652/3193252 co-relation queries the response was YES. Maximal size of possible extension queue 4401. Compared 1428111 event pairs, 19962 based on Foata normal form. 75/197904 useless extension candidates. Maximal degree in co-relation 1597077. Up to 151140 conditions per place. [2023-08-03 21:03:50,414 INFO L140 encePairwiseOnDemand]: 297/323 looper letters, 527 selfloop transitions, 435 changer transitions 41/1007 dead transitions. [2023-08-03 21:03:50,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 1007 transitions, 17456 flow [2023-08-03 21:03:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-03 21:03:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-03 21:03:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2329 transitions. [2023-08-03 21:03:50,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37950138504155123 [2023-08-03 21:03:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2329 transitions. [2023-08-03 21:03:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2329 transitions. [2023-08-03 21:03:50,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:50,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2329 transitions. [2023-08-03 21:03:50,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 122.57894736842105) internal successors, (2329), 19 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:50,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:50,428 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:50,428 INFO L175 Difference]: Start difference. First operand has 156 places, 469 transitions, 7771 flow. Second operand 19 states and 2329 transitions. [2023-08-03 21:03:50,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 1007 transitions, 17456 flow [2023-08-03 21:07:06,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1007 transitions, 17024 flow, removed 216 selfloop flow, removed 0 redundant places. [2023-08-03 21:07:06,936 INFO L231 Difference]: Finished difference. Result has 181 places, 631 transitions, 11804 flow [2023-08-03 21:07:06,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=7559, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11804, PETRI_PLACES=181, PETRI_TRANSITIONS=631} [2023-08-03 21:07:06,937 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2023-08-03 21:07:06,937 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 631 transitions, 11804 flow [2023-08-03 21:07:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.8076923076923) internal successors, (2725), 26 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:07:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:07:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:07:06,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-03 21:07:07,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-03 21:07:07,144 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:07:07,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:07:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1750136455, now seen corresponding path program 2 times [2023-08-03 21:07:07,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:07:07,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171358639] [2023-08-03 21:07:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:07:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:07:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:07:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-03 21:07:07,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:07:07,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171358639] [2023-08-03 21:07:07,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171358639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:07:07,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374855522] [2023-08-03 21:07:07,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:07:07,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:07:07,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:07:07,326 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:07:07,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-03 21:07:07,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:07:07,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:07:07,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 21:07:07,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:07:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-03 21:07:07,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:07:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-03 21:07:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374855522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:07:07,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:07:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-03 21:07:07,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546637952] [2023-08-03 21:07:07,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:07:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 21:07:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:07:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 21:07:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-03 21:07:07,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 323 [2023-08-03 21:07:07,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 631 transitions, 11804 flow. Second operand has 18 states, 18 states have (on average 132.61111111111111) internal successors, (2387), 18 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:07:07,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:07:07,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 323 [2023-08-03 21:07:07,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand