/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:12:47,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:12:47,148 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 09:12:47,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:12:47,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:12:47,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:12:47,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:12:47,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:12:47,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:12:47,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:12:47,191 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:12:47,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:12:47,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:12:47,192 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:12:47,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:12:47,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:12:47,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:12:47,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:12:47,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:12:47,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:12:47,194 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:12:47,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:12:47,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:12:47,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:12:47,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:12:47,196 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:12:47,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:12:47,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:12:47,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:12:47,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:12:47,198 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:12:47,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:12:47,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:12:47,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:12:47,541 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:12:47,542 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:12:47,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-08-24 09:12:48,842 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:12:49,075 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:12:49,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-08-24 09:12:49,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63efafdcf/5ff9f9791d5b4fd58cf662ea0495d09c/FLAGdba521f75 [2023-08-24 09:12:49,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63efafdcf/5ff9f9791d5b4fd58cf662ea0495d09c [2023-08-24 09:12:49,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:12:49,103 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:12:49,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:12:49,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:12:49,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:12:49,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3fba85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49, skipping insertion in model container [2023-08-24 09:12:49,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,148 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:12:49,344 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2023-08-24 09:12:49,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:12:49,363 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:12:49,403 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c[4218,4231] [2023-08-24 09:12:49,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:12:49,420 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:12:49,420 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:12:49,427 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:12:49,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49 WrapperNode [2023-08-24 09:12:49,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:12:49,429 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:12:49,429 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:12:49,430 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:12:49,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,454 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,495 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 317 [2023-08-24 09:12:49,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:12:49,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:12:49,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:12:49,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:12:49,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,522 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,534 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,536 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:12:49,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:12:49,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:12:49,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:12:49,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (1/1) ... [2023-08-24 09:12:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:12:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:49,594 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) [2023-08-24 09:12:49,618 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 [2023-08-24 09:12:49,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:12:49,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:12:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:12:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:12:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:12:49,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:12:49,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:12:49,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 09:12:49,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:12:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:12:49,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:12:49,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:12:49,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:12:49,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:12:49,639 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 09:12:49,749 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:12:49,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:12:50,241 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:12:50,381 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:12:50,381 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 09:12:50,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:12:50 BoogieIcfgContainer [2023-08-24 09:12:50,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:12:50,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:12:50,385 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:12:50,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:12:50,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:12:49" (1/3) ... [2023-08-24 09:12:50,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228226e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:12:50, skipping insertion in model container [2023-08-24 09:12:50,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:12:49" (2/3) ... [2023-08-24 09:12:50,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228226e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:12:50, skipping insertion in model container [2023-08-24 09:12:50,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:12:50" (3/3) ... [2023-08-24 09:12:50,390 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-08-24 09:12:50,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:12:50,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:12:50,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:12:50,460 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 09:12:50,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 224 transitions, 480 flow [2023-08-24 09:12:50,560 INFO L124 PetriNetUnfolderBase]: 18/220 cut-off events. [2023-08-24 09:12:50,560 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:12:50,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 220 events. 18/220 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 183. Up to 2 conditions per place. [2023-08-24 09:12:50,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 224 transitions, 480 flow [2023-08-24 09:12:50,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 208 transitions, 440 flow [2023-08-24 09:12:50,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:12:50,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 208 transitions, 440 flow [2023-08-24 09:12:50,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 208 transitions, 440 flow [2023-08-24 09:12:50,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 208 transitions, 440 flow [2023-08-24 09:12:50,659 INFO L124 PetriNetUnfolderBase]: 18/208 cut-off events. [2023-08-24 09:12:50,659 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:12:50,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 208 events. 18/208 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 183. Up to 2 conditions per place. [2023-08-24 09:12:50,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-08-24 09:12:58,515 INFO L134 LiptonReduction]: Checked pairs total: 4153 [2023-08-24 09:12:58,515 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-08-24 09:12:58,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:12:58,536 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=false, 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;@7a3218d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:12:58,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 09:12:58,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:12:58,550 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-08-24 09:12:58,550 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:12:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:58,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:12:58,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:12:58,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1173720384, now seen corresponding path program 1 times [2023-08-24 09:12:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:58,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898475662] [2023-08-24 09:12:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:59,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898475662] [2023-08-24 09:12:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898475662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:12:59,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:12:59,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 09:12:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525447411] [2023-08-24 09:12:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:12:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:12:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:12:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:12:59,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 422 [2023-08-24 09:12:59,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2023-08-24 09:12:59,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:59,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 422 [2023-08-24 09:12:59,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:59,693 INFO L124 PetriNetUnfolderBase]: 2606/3582 cut-off events. [2023-08-24 09:12:59,693 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-08-24 09:12:59,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7115 conditions, 3582 events. 2606/3582 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15979 event pairs, 498 based on Foata normal form. 1/2283 useless extension candidates. Maximal degree in co-relation 5886. Up to 2275 conditions per place. [2023-08-24 09:12:59,719 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 47 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-24 09:12:59,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 255 flow [2023-08-24 09:12:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:12:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:12:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-24 09:12:59,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031595576619273 [2023-08-24 09:12:59,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-24 09:12:59,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-24 09:12:59,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:59,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-24 09:12:59,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2023-08-24 09:12:59,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:12:59,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:12:59,753 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 3 states and 637 transitions. [2023-08-24 09:12:59,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 255 flow [2023-08-24 09:12:59,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 09:12:59,763 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 101 flow [2023-08-24 09:12:59,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-24 09:12:59,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-24 09:12:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 101 flow [2023-08-24 09:12:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2023-08-24 09:12:59,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:59,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:12:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:12:59,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:12:59,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1174765711, now seen corresponding path program 1 times [2023-08-24 09:12:59,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:59,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457605230] [2023-08-24 09:12:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:59,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:59,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457605230] [2023-08-24 09:12:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457605230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:12:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:12:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:12:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110516071] [2023-08-24 09:12:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:12:59,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:12:59,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:12:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:12:59,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 422 [2023-08-24 09:12:59,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 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) [2023-08-24 09:12:59,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:59,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 422 [2023-08-24 09:12:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:00,407 INFO L124 PetriNetUnfolderBase]: 3843/5059 cut-off events. [2023-08-24 09:13:00,407 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-08-24 09:13:00,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11188 conditions, 5059 events. 3843/5059 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22712 event pairs, 982 based on Foata normal form. 120/4228 useless extension candidates. Maximal degree in co-relation 4007. Up to 3577 conditions per place. [2023-08-24 09:13:00,439 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-24 09:13:00,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 285 flow [2023-08-24 09:13:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:13:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:13:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-24 09:13:00,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49842022116903634 [2023-08-24 09:13:00,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-24 09:13:00,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-24 09:13:00,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:00,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-24 09:13:00,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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) [2023-08-24 09:13:00,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:13:00,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:13:00,448 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 101 flow. Second operand 3 states and 631 transitions. [2023-08-24 09:13:00,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 285 flow [2023-08-24 09:13:00,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:00,450 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 112 flow [2023-08-24 09:13:00,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-24 09:13:00,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-24 09:13:00,451 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 112 flow [2023-08-24 09:13:00,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 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) [2023-08-24 09:13:00,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:00,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:13:00,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:00,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1974936320, now seen corresponding path program 1 times [2023-08-24 09:13:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79456388] [2023-08-24 09:13:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:13:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:00,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79456388] [2023-08-24 09:13:00,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79456388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:13:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117183528] [2023-08-24 09:13:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:13:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:13:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:13:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 422 [2023-08-24 09:13:00,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 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) [2023-08-24 09:13:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 422 [2023-08-24 09:13:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:01,045 INFO L124 PetriNetUnfolderBase]: 3600/4879 cut-off events. [2023-08-24 09:13:01,045 INFO L125 PetriNetUnfolderBase]: For 1834/1834 co-relation queries the response was YES. [2023-08-24 09:13:01,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 4879 events. 3600/4879 cut-off events. For 1834/1834 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23017 event pairs, 937 based on Foata normal form. 106/4530 useless extension candidates. Maximal degree in co-relation 8167. Up to 3548 conditions per place. [2023-08-24 09:13:01,076 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-24 09:13:01,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 301 flow [2023-08-24 09:13:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:13:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:13:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-24 09:13:01,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968404423380727 [2023-08-24 09:13:01,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-24 09:13:01,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-24 09:13:01,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:01,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-24 09:13:01,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 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) [2023-08-24 09:13:01,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:13:01,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-24 09:13:01,084 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 112 flow. Second operand 3 states and 629 transitions. [2023-08-24 09:13:01,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 301 flow [2023-08-24 09:13:01,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:01,087 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 124 flow [2023-08-24 09:13:01,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-24 09:13:01,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-24 09:13:01,088 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 124 flow [2023-08-24 09:13:01,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 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) [2023-08-24 09:13:01,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:01,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:13:01,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:01,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 271543926, now seen corresponding path program 1 times [2023-08-24 09:13:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484649270] [2023-08-24 09:13:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:01,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484649270] [2023-08-24 09:13:01,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484649270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:01,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:01,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 09:13:01,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180042661] [2023-08-24 09:13:01,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:01,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:13:01,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:13:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:13:01,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 422 [2023-08-24 09:13:01,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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) [2023-08-24 09:13:01,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:01,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 422 [2023-08-24 09:13:01,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:01,762 INFO L124 PetriNetUnfolderBase]: 3189/4593 cut-off events. [2023-08-24 09:13:01,763 INFO L125 PetriNetUnfolderBase]: For 2513/2513 co-relation queries the response was YES. [2023-08-24 09:13:01,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11217 conditions, 4593 events. 3189/4593 cut-off events. For 2513/2513 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24403 event pairs, 2374 based on Foata normal form. 96/4555 useless extension candidates. Maximal degree in co-relation 5010. Up to 3495 conditions per place. [2023-08-24 09:13:01,793 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 61 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-24 09:13:01,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 333 flow [2023-08-24 09:13:01,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:13:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:13:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-24 09:13:01,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377962085308057 [2023-08-24 09:13:01,796 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-24 09:13:01,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-24 09:13:01,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:01,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-24 09:13:01,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 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) [2023-08-24 09:13:01,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-24 09:13:01,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-24 09:13:01,802 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 124 flow. Second operand 4 states and 739 transitions. [2023-08-24 09:13:01,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 333 flow [2023-08-24 09:13:01,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:01,805 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 142 flow [2023-08-24 09:13:01,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-24 09:13:01,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 09:13:01,806 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 142 flow [2023-08-24 09:13:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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) [2023-08-24 09:13:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 09:13:01,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:01,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash 31755688, now seen corresponding path program 1 times [2023-08-24 09:13:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:01,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707727185] [2023-08-24 09:13:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:01,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707727185] [2023-08-24 09:13:01,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707727185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:01,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:01,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:13:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095628354] [2023-08-24 09:13:01,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:13:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:13:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:13:01,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 422 [2023-08-24 09:13:01,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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) [2023-08-24 09:13:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 422 [2023-08-24 09:13:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:02,616 INFO L124 PetriNetUnfolderBase]: 3929/5803 cut-off events. [2023-08-24 09:13:02,616 INFO L125 PetriNetUnfolderBase]: For 3196/3196 co-relation queries the response was YES. [2023-08-24 09:13:02,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5803 events. 3929/5803 cut-off events. For 3196/3196 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33347 event pairs, 3012 based on Foata normal form. 166/5802 useless extension candidates. Maximal degree in co-relation 11254. Up to 4406 conditions per place. [2023-08-24 09:13:02,653 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 60 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-24 09:13:02,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 348 flow [2023-08-24 09:13:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:13:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:13:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 737 transitions. [2023-08-24 09:13:02,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43661137440758296 [2023-08-24 09:13:02,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 737 transitions. [2023-08-24 09:13:02,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 737 transitions. [2023-08-24 09:13:02,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:02,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 737 transitions. [2023-08-24 09:13:02,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 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) [2023-08-24 09:13:02,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-24 09:13:02,661 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-24 09:13:02,662 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 142 flow. Second operand 4 states and 737 transitions. [2023-08-24 09:13:02,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 348 flow [2023-08-24 09:13:02,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:02,665 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 161 flow [2023-08-24 09:13:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-24 09:13:02,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-08-24 09:13:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 161 flow [2023-08-24 09:13:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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) [2023-08-24 09:13:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 09:13:02,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:02,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1434548942, now seen corresponding path program 1 times [2023-08-24 09:13:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565604015] [2023-08-24 09:13:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:03,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:03,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565604015] [2023-08-24 09:13:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565604015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:13:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587242017] [2023-08-24 09:13:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:03,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:13:03,149 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) [2023-08-24 09:13:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 09:13:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:03,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 09:13:03,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:13:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:03,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:13:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587242017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:03,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:13:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-08-24 09:13:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740480160] [2023-08-24 09:13:03,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:13:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:13:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-24 09:13:03,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 09:13:03,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:13:03,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:03,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 09:13:03,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:05,406 INFO L124 PetriNetUnfolderBase]: 14993/20562 cut-off events. [2023-08-24 09:13:05,407 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-24 09:13:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 20562 events. 14993/20562 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 109880 event pairs, 1082 based on Foata normal form. 372/20932 useless extension candidates. Maximal degree in co-relation 37789. Up to 8096 conditions per place. [2023-08-24 09:13:05,529 INFO L140 encePairwiseOnDemand]: 416/422 looper letters, 128 selfloop transitions, 8 changer transitions 5/141 dead transitions. [2023-08-24 09:13:05,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 141 transitions, 724 flow [2023-08-24 09:13:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:13:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:13:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1209 transitions. [2023-08-24 09:13:05,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-08-24 09:13:05,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1209 transitions. [2023-08-24 09:13:05,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1209 transitions. [2023-08-24 09:13:05,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:05,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1209 transitions. [2023-08-24 09:13:05,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.5) internal successors, (1209), 6 states have internal predecessors, (1209), 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) [2023-08-24 09:13:05,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:13:05,545 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:13:05,546 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 161 flow. Second operand 6 states and 1209 transitions. [2023-08-24 09:13:05,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 141 transitions, 724 flow [2023-08-24 09:13:05,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 141 transitions, 719 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:05,554 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 211 flow [2023-08-24 09:13:05,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-24 09:13:05,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2023-08-24 09:13:05,557 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 211 flow [2023-08-24 09:13:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:13:05,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:05,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:05,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 09:13:05,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 09:13:05,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:05,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash -141903402, now seen corresponding path program 2 times [2023-08-24 09:13:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:05,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61535646] [2023-08-24 09:13:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:05,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:06,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:06,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61535646] [2023-08-24 09:13:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61535646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:06,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:13:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170673299] [2023-08-24 09:13:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:13:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:13:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:13:06,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 09:13:06,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 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) [2023-08-24 09:13:06,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:06,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 09:13:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:08,667 INFO L124 PetriNetUnfolderBase]: 17581/24432 cut-off events. [2023-08-24 09:13:08,668 INFO L125 PetriNetUnfolderBase]: For 13550/13550 co-relation queries the response was YES. [2023-08-24 09:13:08,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63407 conditions, 24432 events. 17581/24432 cut-off events. For 13550/13550 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 136742 event pairs, 2210 based on Foata normal form. 152/24582 useless extension candidates. Maximal degree in co-relation 50813. Up to 16026 conditions per place. [2023-08-24 09:13:08,823 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 120 selfloop transitions, 11 changer transitions 26/157 dead transitions. [2023-08-24 09:13:08,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 842 flow [2023-08-24 09:13:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:13:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:13:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1400 transitions. [2023-08-24 09:13:08,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-08-24 09:13:08,828 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1400 transitions. [2023-08-24 09:13:08,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1400 transitions. [2023-08-24 09:13:08,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:08,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1400 transitions. [2023-08-24 09:13:08,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 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) [2023-08-24 09:13:08,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 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) [2023-08-24 09:13:08,836 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 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) [2023-08-24 09:13:08,836 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 211 flow. Second operand 7 states and 1400 transitions. [2023-08-24 09:13:08,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 157 transitions, 842 flow [2023-08-24 09:13:08,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 157 transitions, 842 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 09:13:08,859 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 290 flow [2023-08-24 09:13:08,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-08-24 09:13:08,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2023-08-24 09:13:08,860 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 290 flow [2023-08-24 09:13:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 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) [2023-08-24 09:13:08,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:08,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:08,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 09:13:08,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:08,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash -567978492, now seen corresponding path program 3 times [2023-08-24 09:13:08,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:08,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585609084] [2023-08-24 09:13:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:09,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585609084] [2023-08-24 09:13:09,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585609084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:09,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:09,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:13:09,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713471005] [2023-08-24 09:13:09,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:09,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:13:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:13:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:13:09,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 09:13:09,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:13:09,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:09,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 09:13:09,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:12,714 INFO L124 PetriNetUnfolderBase]: 25005/34523 cut-off events. [2023-08-24 09:13:12,715 INFO L125 PetriNetUnfolderBase]: For 36909/36909 co-relation queries the response was YES. [2023-08-24 09:13:12,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100149 conditions, 34523 events. 25005/34523 cut-off events. For 36909/36909 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 198954 event pairs, 2348 based on Foata normal form. 250/34771 useless extension candidates. Maximal degree in co-relation 83217. Up to 17020 conditions per place. [2023-08-24 09:13:13,027 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 170 selfloop transitions, 29 changer transitions 6/205 dead transitions. [2023-08-24 09:13:13,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1305 flow [2023-08-24 09:13:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:13:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:13:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1604 transitions. [2023-08-24 09:13:13,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47511848341232227 [2023-08-24 09:13:13,032 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1604 transitions. [2023-08-24 09:13:13,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1604 transitions. [2023-08-24 09:13:13,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:13,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1604 transitions. [2023-08-24 09:13:13,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 200.5) internal successors, (1604), 8 states have internal predecessors, (1604), 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) [2023-08-24 09:13:13,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 422.0) internal successors, (3798), 9 states have internal predecessors, (3798), 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) [2023-08-24 09:13:13,042 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 422.0) internal successors, (3798), 9 states have internal predecessors, (3798), 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) [2023-08-24 09:13:13,042 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 290 flow. Second operand 8 states and 1604 transitions. [2023-08-24 09:13:13,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1305 flow [2023-08-24 09:13:13,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 205 transitions, 1301 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 09:13:13,164 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 510 flow [2023-08-24 09:13:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2023-08-24 09:13:13,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2023-08-24 09:13:13,167 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 510 flow [2023-08-24 09:13:13,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:13:13,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:13,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:13,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 09:13:13,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:13,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -481045102, now seen corresponding path program 4 times [2023-08-24 09:13:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954327187] [2023-08-24 09:13:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954327187] [2023-08-24 09:13:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954327187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:13:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415215183] [2023-08-24 09:13:13,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:13:13,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:13:13,508 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) [2023-08-24 09:13:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 09:13:13,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:13:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:13:13,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 09:13:13,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:13:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:13,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:13:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:13,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415215183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:13:13,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:13:13,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2023-08-24 09:13:13,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063454495] [2023-08-24 09:13:13,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:13:13,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:13:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:13:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:13:13,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 422 [2023-08-24 09:13:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 510 flow. Second operand has 16 states, 16 states have (on average 181.0625) internal successors, (2897), 16 states have internal predecessors, (2897), 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) [2023-08-24 09:13:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 422 [2023-08-24 09:13:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:22,743 INFO L124 PetriNetUnfolderBase]: 65180/90426 cut-off events. [2023-08-24 09:13:22,744 INFO L125 PetriNetUnfolderBase]: For 172319/172319 co-relation queries the response was YES. [2023-08-24 09:13:23,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312990 conditions, 90426 events. 65180/90426 cut-off events. For 172319/172319 co-relation queries the response was YES. Maximal size of possible extension queue 3116. Compared 599056 event pairs, 5482 based on Foata normal form. 4476/94900 useless extension candidates. Maximal degree in co-relation 276601. Up to 14447 conditions per place. [2023-08-24 09:13:23,421 INFO L140 encePairwiseOnDemand]: 412/422 looper letters, 518 selfloop transitions, 132 changer transitions 0/650 dead transitions. [2023-08-24 09:13:23,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 650 transitions, 5291 flow [2023-08-24 09:13:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:13:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:13:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3527 transitions. [2023-08-24 09:13:23,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643233280674039 [2023-08-24 09:13:23,436 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3527 transitions. [2023-08-24 09:13:23,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3527 transitions. [2023-08-24 09:13:23,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:23,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3527 transitions. [2023-08-24 09:13:23,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 195.94444444444446) internal successors, (3527), 18 states have internal predecessors, (3527), 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) [2023-08-24 09:13:23,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 422.0) internal successors, (8018), 19 states have internal predecessors, (8018), 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) [2023-08-24 09:13:23,459 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 422.0) internal successors, (8018), 19 states have internal predecessors, (8018), 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) [2023-08-24 09:13:23,459 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 510 flow. Second operand 18 states and 3527 transitions. [2023-08-24 09:13:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 650 transitions, 5291 flow [2023-08-24 09:13:25,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 650 transitions, 5222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 09:13:25,205 INFO L231 Difference]: Finished difference. Result has 104 places, 202 transitions, 1856 flow [2023-08-24 09:13:25,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1856, PETRI_PLACES=104, PETRI_TRANSITIONS=202} [2023-08-24 09:13:25,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2023-08-24 09:13:25,206 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 202 transitions, 1856 flow [2023-08-24 09:13:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.0625) internal successors, (2897), 16 states have internal predecessors, (2897), 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) [2023-08-24 09:13:25,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:25,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:25,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 09:13:25,409 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,SelfDestructingSolverStorable8 [2023-08-24 09:13:25,410 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:25,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1618422774, now seen corresponding path program 5 times [2023-08-24 09:13:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908242275] [2023-08-24 09:13:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:25,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908242275] [2023-08-24 09:13:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908242275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:13:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:13:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911930726] [2023-08-24 09:13:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:25,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:13:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:13:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:13:25,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 422 [2023-08-24 09:13:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 202 transitions, 1856 flow. Second operand has 6 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 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) [2023-08-24 09:13:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 422 [2023-08-24 09:13:25,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:38,775 INFO L124 PetriNetUnfolderBase]: 77918/110118 cut-off events. [2023-08-24 09:13:38,775 INFO L125 PetriNetUnfolderBase]: For 462789/462789 co-relation queries the response was YES. [2023-08-24 09:13:39,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475958 conditions, 110118 events. 77918/110118 cut-off events. For 462789/462789 co-relation queries the response was YES. Maximal size of possible extension queue 4131. Compared 767865 event pairs, 21578 based on Foata normal form. 594/110710 useless extension candidates. Maximal degree in co-relation 413627. Up to 76345 conditions per place. [2023-08-24 09:13:39,792 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 343 selfloop transitions, 182 changer transitions 69/594 dead transitions. [2023-08-24 09:13:39,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 594 transitions, 6205 flow [2023-08-24 09:13:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:13:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:13:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1954 transitions. [2023-08-24 09:13:39,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46303317535545024 [2023-08-24 09:13:39,800 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1954 transitions. [2023-08-24 09:13:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1954 transitions. [2023-08-24 09:13:39,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:39,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1954 transitions. [2023-08-24 09:13:39,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.4) internal successors, (1954), 10 states have internal predecessors, (1954), 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) [2023-08-24 09:13:39,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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) [2023-08-24 09:13:39,815 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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) [2023-08-24 09:13:39,815 INFO L175 Difference]: Start difference. First operand has 104 places, 202 transitions, 1856 flow. Second operand 10 states and 1954 transitions. [2023-08-24 09:13:39,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 594 transitions, 6205 flow [2023-08-24 09:13:46,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 594 transitions, 6095 flow, removed 55 selfloop flow, removed 0 redundant places. [2023-08-24 09:13:46,672 INFO L231 Difference]: Finished difference. Result has 121 places, 336 transitions, 3948 flow [2023-08-24 09:13:46,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3948, PETRI_PLACES=121, PETRI_TRANSITIONS=336} [2023-08-24 09:13:46,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2023-08-24 09:13:46,674 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 336 transitions, 3948 flow [2023-08-24 09:13:46,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 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) [2023-08-24 09:13:46,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:46,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:13:46,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 09:13:46,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:13:46,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash 220378546, now seen corresponding path program 6 times [2023-08-24 09:13:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299505456] [2023-08-24 09:13:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:46,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:46,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299505456] [2023-08-24 09:13:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299505456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:13:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69651881] [2023-08-24 09:13:46,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:13:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:13:46,925 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) [2023-08-24 09:13:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 09:13:47,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:13:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:13:47,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 09:13:47,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:13:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:13:47,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:13:47,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69651881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:13:47,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:13:47,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-08-24 09:13:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452525974] [2023-08-24 09:13:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:13:47,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:13:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:13:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-24 09:13:47,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 09:13:47,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 336 transitions, 3948 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:13:47,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:47,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 09:13:47,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:07,020 INFO L124 PetriNetUnfolderBase]: 111421/159343 cut-off events. [2023-08-24 09:14:07,020 INFO L125 PetriNetUnfolderBase]: For 766500/766500 co-relation queries the response was YES. [2023-08-24 09:14:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735449 conditions, 159343 events. 111421/159343 cut-off events. For 766500/766500 co-relation queries the response was YES. Maximal size of possible extension queue 6112. Compared 1206562 event pairs, 19088 based on Foata normal form. 2680/162021 useless extension candidates. Maximal degree in co-relation 721876. Up to 47327 conditions per place. [2023-08-24 09:14:08,589 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 585 selfloop transitions, 191 changer transitions 7/783 dead transitions. [2023-08-24 09:14:08,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 783 transitions, 9815 flow [2023-08-24 09:14:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:14:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:14:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-08-24 09:14:08,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794628751974723 [2023-08-24 09:14:08,593 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-08-24 09:14:08,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-08-24 09:14:08,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:08,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-08-24 09:14:08,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 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) [2023-08-24 09:14:08,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:14:08,599 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:14:08,600 INFO L175 Difference]: Start difference. First operand has 121 places, 336 transitions, 3948 flow. Second operand 6 states and 1214 transitions. [2023-08-24 09:14:08,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 783 transitions, 9815 flow [2023-08-24 09:14:42,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 783 transitions, 9763 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-24 09:14:42,591 INFO L231 Difference]: Finished difference. Result has 125 places, 491 transitions, 7083 flow [2023-08-24 09:14:42,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7083, PETRI_PLACES=125, PETRI_TRANSITIONS=491} [2023-08-24 09:14:42,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2023-08-24 09:14:42,592 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 491 transitions, 7083 flow [2023-08-24 09:14:42,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:14:42,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:42,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:42,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:42,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:42,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:14:42,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1680460490, now seen corresponding path program 7 times [2023-08-24 09:14:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:42,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708478431] [2023-08-24 09:14:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708478431] [2023-08-24 09:14:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708478431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439940720] [2023-08-24 09:14:43,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:14:43,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:43,027 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) [2023-08-24 09:14:43,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 09:14:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:43,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:43,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:43,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:43,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439940720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:43,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:43,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-08-24 09:14:43,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153821053] [2023-08-24 09:14:43,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:43,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:14:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:14:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:14:43,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 422 [2023-08-24 09:14:43,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 491 transitions, 7083 flow. Second operand has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 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) [2023-08-24 09:14:43,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:43,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 422 [2023-08-24 09:14:43,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:15:08,690 INFO L124 PetriNetUnfolderBase]: 130754/185808 cut-off events. [2023-08-24 09:15:08,690 INFO L125 PetriNetUnfolderBase]: For 1014930/1014930 co-relation queries the response was YES. [2023-08-24 09:15:10,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899055 conditions, 185808 events. 130754/185808 cut-off events. For 1014930/1014930 co-relation queries the response was YES. Maximal size of possible extension queue 7055. Compared 1414961 event pairs, 20838 based on Foata normal form. 4064/189870 useless extension candidates. Maximal degree in co-relation 848714. Up to 68340 conditions per place. [2023-08-24 09:15:10,627 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 431 selfloop transitions, 461 changer transitions 33/925 dead transitions. [2023-08-24 09:15:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 925 transitions, 13641 flow [2023-08-24 09:15:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:15:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:15:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1944 transitions. [2023-08-24 09:15:10,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606635071090047 [2023-08-24 09:15:10,633 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1944 transitions. [2023-08-24 09:15:10,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1944 transitions. [2023-08-24 09:15:10,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:15:10,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1944 transitions. [2023-08-24 09:15:10,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 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) [2023-08-24 09:15:10,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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) [2023-08-24 09:15:10,642 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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) [2023-08-24 09:15:10,642 INFO L175 Difference]: Start difference. First operand has 125 places, 491 transitions, 7083 flow. Second operand 10 states and 1944 transitions. [2023-08-24 09:15:10,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 925 transitions, 13641 flow [2023-08-24 09:15:55,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 925 transitions, 13477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 09:15:55,784 INFO L231 Difference]: Finished difference. Result has 136 places, 598 transitions, 10060 flow [2023-08-24 09:15:55,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10060, PETRI_PLACES=136, PETRI_TRANSITIONS=598} [2023-08-24 09:15:55,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2023-08-24 09:15:55,785 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 598 transitions, 10060 flow [2023-08-24 09:15:55,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 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) [2023-08-24 09:15:55,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:15:55,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:15:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 09:15:55,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:55,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:15:55,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:15:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -18256108, now seen corresponding path program 8 times [2023-08-24 09:15:55,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:15:55,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452239361] [2023-08-24 09:15:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:15:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:15:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:15:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452239361] [2023-08-24 09:15:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452239361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:15:56,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:15:56,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:15:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035891102] [2023-08-24 09:15:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:15:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:15:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:15:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:15:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:15:56,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 09:15:56,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 598 transitions, 10060 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:15:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:15:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 09:15:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:16:23,646 INFO L124 PetriNetUnfolderBase]: 130244/184818 cut-off events. [2023-08-24 09:16:23,647 INFO L125 PetriNetUnfolderBase]: For 1263202/1263202 co-relation queries the response was YES. [2023-08-24 09:16:25,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978381 conditions, 184818 events. 130244/184818 cut-off events. For 1263202/1263202 co-relation queries the response was YES. Maximal size of possible extension queue 6963. Compared 1391764 event pairs, 37509 based on Foata normal form. 116/184932 useless extension candidates. Maximal degree in co-relation 927450. Up to 161544 conditions per place. [2023-08-24 09:16:25,842 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 351 selfloop transitions, 368 changer transitions 27/746 dead transitions. [2023-08-24 09:16:25,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 746 transitions, 12756 flow [2023-08-24 09:16:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:16:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:16:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-08-24 09:16:25,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476303317535545 [2023-08-24 09:16:25,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-08-24 09:16:25,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-08-24 09:16:25,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:16:25,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-08-24 09:16:25,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 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) [2023-08-24 09:16:25,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:16:25,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2023-08-24 09:16:25,851 INFO L175 Difference]: Start difference. First operand has 136 places, 598 transitions, 10060 flow. Second operand 6 states and 1206 transitions. [2023-08-24 09:16:25,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 746 transitions, 12756 flow [2023-08-24 09:17:55,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 746 transitions, 12124 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-08-24 09:17:55,390 INFO L231 Difference]: Finished difference. Result has 141 places, 600 transitions, 10641 flow [2023-08-24 09:17:55,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9500, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10641, PETRI_PLACES=141, PETRI_TRANSITIONS=600} [2023-08-24 09:17:55,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2023-08-24 09:17:55,391 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 600 transitions, 10641 flow [2023-08-24 09:17:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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) [2023-08-24 09:17:55,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:17:55,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:17:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 09:17:55,392 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 09:17:55,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:17:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 14607234, now seen corresponding path program 9 times [2023-08-24 09:17:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:17:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709066564] [2023-08-24 09:17:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:17:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:17:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:17:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:17:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:17:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709066564] [2023-08-24 09:17:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709066564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:17:55,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:17:55,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 09:17:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526909801] [2023-08-24 09:17:55,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:17:55,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:17:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:17:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:17:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:17:55,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 422 [2023-08-24 09:17:55,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 600 transitions, 10641 flow. Second operand has 7 states, 7 states have (on average 180.57142857142858) internal successors, (1264), 7 states have internal predecessors, (1264), 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) [2023-08-24 09:17:55,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:17:55,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 422 [2023-08-24 09:17:55,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand