/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:33:56,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:33:56,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:33:56,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:33:56,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:33:56,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:33:56,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:33:56,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:33:56,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:33:56,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:33:56,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:33:56,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:33:56,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:33:56,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:33:56,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:33:56,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:33:56,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:33:56,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:33:56,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:33:56,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:33:56,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:33:56,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:33:56,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:33:56,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:33:56,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:33:56,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:33:56,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:33:56,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:33:56,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 22:33:56,227 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:33:56,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:33:56,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:33:56,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:33:56,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:33:56,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:33:56,229 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:33:56,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:33:56,229 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:33:56,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:33:56,230 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:33:56,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:33:56,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:33:56,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:33:56,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:33:56,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:33:56,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:33:56,232 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:33:56,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:33:56,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:33:56,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:33:56,414 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:33:56,415 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:33:56,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-01-27 22:33:57,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:33:57,432 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:33:57,432 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-01-27 22:33:57,436 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e591ce0a8/d5ec3b9c59754ef3927ae3be325ae13c/FLAGed41b9f73 [2023-01-27 22:33:57,445 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e591ce0a8/d5ec3b9c59754ef3927ae3be325ae13c [2023-01-27 22:33:57,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:33:57,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:33:57,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:33:57,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:33:57,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:33:57,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54989feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57, skipping insertion in model container [2023-01-27 22:33:57,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:33:57,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:33:57,576 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-01-27 22:33:57,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:33:57,585 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:33:57,595 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-01-27 22:33:57,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:33:57,600 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:33:57,600 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:33:57,604 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:33:57,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57 WrapperNode [2023-01-27 22:33:57,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:33:57,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:33:57,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:33:57,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:33:57,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,623 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-01-27 22:33:57,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:33:57,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:33:57,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:33:57,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:33:57,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:33:57,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:33:57,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:33:57,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:33:57,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (1/1) ... [2023-01-27 22:33:57,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:33:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:33:57,659 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) [2023-01-27 22:33:57,663 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 [2023-01-27 22:33:57,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:33:57,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:33:57,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:33:57,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:33:57,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:33:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:33:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:33:57,681 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:33:57,736 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:33:57,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:33:57,835 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:33:57,863 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:33:57,863 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 22:33:57,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:33:57 BoogieIcfgContainer [2023-01-27 22:33:57,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:33:57,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:33:57,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:33:57,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:33:57,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:33:57" (1/3) ... [2023-01-27 22:33:57,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3464bf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:33:57, skipping insertion in model container [2023-01-27 22:33:57,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:33:57" (2/3) ... [2023-01-27 22:33:57,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3464bf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:33:57, skipping insertion in model container [2023-01-27 22:33:57,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:33:57" (3/3) ... [2023-01-27 22:33:57,870 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-01-27 22:33:57,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:33:57,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:33:57,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:33:57,930 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 22:33:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2023-01-27 22:33:57,997 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-01-27 22:33:57,997 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:33:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-01-27 22:33:58,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 168 flow [2023-01-27 22:33:58,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-01-27 22:33:58,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:33:58,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 144 flow [2023-01-27 22:33:58,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 144 flow [2023-01-27 22:33:58,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 144 flow [2023-01-27 22:33:58,026 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2023-01-27 22:33:58,027 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:33:58,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 6/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-01-27 22:33:58,028 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-27 22:33:59,590 INFO L134 LiptonReduction]: Checked pairs total: 413 [2023-01-27 22:33:59,590 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-01-27 22:33:59,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:33:59,603 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;@558478e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:33:59,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 22:33:59,606 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 22:33:59,606 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:33:59,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:33:59,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:33:59,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:33:59,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:33:59,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1270362665, now seen corresponding path program 1 times [2023-01-27 22:33:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:33:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993822163] [2023-01-27 22:33:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:33:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:33:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:33:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:33:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:33:59,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993822163] [2023-01-27 22:33:59,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993822163] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:33:59,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:33:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:33:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317765228] [2023-01-27 22:33:59,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:33:59,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:33:59,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:33:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:33:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:33:59,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2023-01-27 22:33:59,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:33:59,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:33:59,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2023-01-27 22:33:59,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:00,015 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-01-27 22:34:00,016 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-27 22:34:00,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-01-27 22:34:00,019 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-27 22:34:00,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-27 22:34:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:34:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:34:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-01-27 22:34:00,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543795620437956 [2023-01-27 22:34:00,028 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-01-27 22:34:00,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-01-27 22:34:00,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:00,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-01-27 22:34:00,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,039 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 249 transitions. [2023-01-27 22:34:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-27 22:34:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 22:34:00,042 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-27 22:34:00,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-27 22:34:00,045 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-27 22:34:00,045 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-27 22:34:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:00,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:00,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:34:00,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:00,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 33938299, now seen corresponding path program 1 times [2023-01-27 22:34:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968495052] [2023-01-27 22:34:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968495052] [2023-01-27 22:34:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968495052] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:34:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:34:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 22:34:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699565502] [2023-01-27 22:34:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:34:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:34:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:34:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 22:34:00,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 137 [2023-01-27 22:34:00,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:00,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 137 [2023-01-27 22:34:00,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:00,210 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-01-27 22:34:00,210 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-01-27 22:34:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 484 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2023-01-27 22:34:00,211 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-01-27 22:34:00,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-01-27 22:34:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:34:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:34:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2023-01-27 22:34:00,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481751824817518 [2023-01-27 22:34:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 307 transitions. [2023-01-27 22:34:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 307 transitions. [2023-01-27 22:34:00,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:00,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 307 transitions. [2023-01-27 22:34:00,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,222 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 307 transitions. [2023-01-27 22:34:00,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-01-27 22:34:00,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 22:34:00,224 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-01-27 22:34:00,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-01-27 22:34:00,224 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-27 22:34:00,224 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-01-27 22:34:00,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:00,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:34:00,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:00,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1659358149, now seen corresponding path program 2 times [2023-01-27 22:34:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462398861] [2023-01-27 22:34:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462398861] [2023-01-27 22:34:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462398861] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100317596] [2023-01-27 22:34:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:34:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:00,270 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) [2023-01-27 22:34:00,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:34:00,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 22:34:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 22:34:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:00,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 22:34:00,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100317596] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:34:00,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 22:34:00,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 22:34:00,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732656277] [2023-01-27 22:34:00,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:34:00,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:34:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:00,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:34:00,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 22:34:00,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-01-27 22:34:00,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:00,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-01-27 22:34:00,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:00,399 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-01-27 22:34:00,400 INFO L131 PetriNetUnfolder]: For 52/59 co-relation queries the response was YES. [2023-01-27 22:34:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 24 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2023-01-27 22:34:00,401 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-27 22:34:00,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-01-27 22:34:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:34:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:34:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-01-27 22:34:00,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397810218978102 [2023-01-27 22:34:00,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-01-27 22:34:00,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-01-27 22:34:00,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:00,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-01-27 22:34:00,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,404 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 241 transitions. [2023-01-27 22:34:00,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-01-27 22:34:00,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 22:34:00,405 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-01-27 22:34:00,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-01-27 22:34:00,406 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-27 22:34:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-01-27 22:34:00,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:00,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:00,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:00,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:00,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:00,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash 479227940, now seen corresponding path program 1 times [2023-01-27 22:34:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:00,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200681887] [2023-01-27 22:34:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:00,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:00,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200681887] [2023-01-27 22:34:00,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200681887] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:00,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077508242] [2023-01-27 22:34:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:00,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:00,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:00,733 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) [2023-01-27 22:34:00,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:34:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:34:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:00,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:01,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077508242] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:01,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:34:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-01-27 22:34:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465319823] [2023-01-27 22:34:01,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:34:01,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:34:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:34:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-27 22:34:01,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-27 22:34:01,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:01,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-27 22:34:01,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:01,138 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2023-01-27 22:34:01,138 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2023-01-27 22:34:01,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 28/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2023-01-27 22:34:01,140 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-27 22:34:01,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2023-01-27 22:34:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:34:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:34:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-01-27 22:34:01,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237226277372263 [2023-01-27 22:34:01,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-01-27 22:34:01,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-01-27 22:34:01,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:01,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-01-27 22:34:01,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,143 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 287 transitions. [2023-01-27 22:34:01,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2023-01-27 22:34:01,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 22:34:01,145 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-01-27 22:34:01,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-01-27 22:34:01,146 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-27 22:34:01,146 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-01-27 22:34:01,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:01,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:01,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-27 22:34:01,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:01,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1994220820, now seen corresponding path program 2 times [2023-01-27 22:34:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585314746] [2023-01-27 22:34:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:01,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585314746] [2023-01-27 22:34:01,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585314746] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728272962] [2023-01-27 22:34:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:34:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:01,416 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) [2023-01-27 22:34:01,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:34:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:34:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 22:34:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:01,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728272962] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:01,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:01,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-01-27 22:34:01,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145762834] [2023-01-27 22:34:01,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 22:34:01,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 22:34:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-27 22:34:01,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-01-27 22:34:01,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:01,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-01-27 22:34:01,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:01,710 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2023-01-27 22:34:01,710 INFO L131 PetriNetUnfolder]: For 231/243 co-relation queries the response was YES. [2023-01-27 22:34:01,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 231/243 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 757 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2023-01-27 22:34:01,715 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-01-27 22:34:01,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2023-01-27 22:34:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:34:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:34:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2023-01-27 22:34:01,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44525547445255476 [2023-01-27 22:34:01,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 305 transitions. [2023-01-27 22:34:01,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 305 transitions. [2023-01-27 22:34:01,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:01,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 305 transitions. [2023-01-27 22:34:01,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,720 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 305 transitions. [2023-01-27 22:34:01,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2023-01-27 22:34:01,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 22:34:01,724 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-01-27 22:34:01,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-27 22:34:01,726 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-01-27 22:34:01,726 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-01-27 22:34:01,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:01,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:01,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:01,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 22:34:01,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:01,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:01,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 157752969, now seen corresponding path program 3 times [2023-01-27 22:34:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582108093] [2023-01-27 22:34:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:02,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582108093] [2023-01-27 22:34:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582108093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201207065] [2023-01-27 22:34:02,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:34:02,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:02,018 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) [2023-01-27 22:34:02,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:34:02,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:34:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 22:34:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:02,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:02,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201207065] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:02,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:02,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 22:34:02,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988540941] [2023-01-27 22:34:02,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:02,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:34:02,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:34:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:34:02,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:02,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:02,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:02,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:02,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:02,551 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2023-01-27 22:34:02,551 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-01-27 22:34:02,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1459 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2023-01-27 22:34:02,553 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2023-01-27 22:34:02,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2023-01-27 22:34:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 22:34:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 22:34:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 929 transitions. [2023-01-27 22:34:02,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238138686131387 [2023-01-27 22:34:02,556 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 929 transitions. [2023-01-27 22:34:02,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 929 transitions. [2023-01-27 22:34:02,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:02,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 929 transitions. [2023-01-27 22:34:02,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.0625) internal successors, (929), 16 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:02,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:02,561 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:02,562 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 929 transitions. [2023-01-27 22:34:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2023-01-27 22:34:02,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 22:34:02,566 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2023-01-27 22:34:02,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-01-27 22:34:02,567 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-01-27 22:34:02,567 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2023-01-27 22:34:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:02,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:02,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:02,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:02,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:02,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:02,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1226601811, now seen corresponding path program 4 times [2023-01-27 22:34:02,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:02,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274344213] [2023-01-27 22:34:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:02,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:02,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274344213] [2023-01-27 22:34:02,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274344213] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:02,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490347458] [2023-01-27 22:34:02,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:34:02,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:02,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:34:02,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:34:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:34:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:02,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490347458] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:03,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:03,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 22:34:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593266618] [2023-01-27 22:34:03,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:34:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:34:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:34:03,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:03,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 54.4) internal successors, (816), 15 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:03,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:03,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:03,284 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2023-01-27 22:34:03,285 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2023-01-27 22:34:03,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 535 events. 297/535 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2218 event pairs, 21 based on Foata normal form. 38/573 useless extension candidates. Maximal degree in co-relation 1688. Up to 290 conditions per place. [2023-01-27 22:34:03,288 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-01-27 22:34:03,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2023-01-27 22:34:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 22:34:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 22:34:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 975 transitions. [2023-01-27 22:34:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41863460712752254 [2023-01-27 22:34:03,290 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 975 transitions. [2023-01-27 22:34:03,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 975 transitions. [2023-01-27 22:34:03,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:03,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 975 transitions. [2023-01-27 22:34:03,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,295 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,295 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 975 transitions. [2023-01-27 22:34:03,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2023-01-27 22:34:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-01-27 22:34:03,300 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2023-01-27 22:34:03,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=683, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-01-27 22:34:03,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-01-27 22:34:03,301 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2023-01-27 22:34:03,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.4) internal successors, (816), 15 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:03,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:03,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:03,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:03,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:03,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193385, now seen corresponding path program 5 times [2023-01-27 22:34:03,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:03,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303350425] [2023-01-27 22:34:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:03,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303350425] [2023-01-27 22:34:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303350425] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868470051] [2023-01-27 22:34:03,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:34:03,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:03,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:03,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:03,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:34:03,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:34:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:34:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:03,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:03,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868470051] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:03,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:03,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-01-27 22:34:03,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663565968] [2023-01-27 22:34:03,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:03,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 22:34:03,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 22:34:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-27 22:34:03,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-27 22:34:03,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:03,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-27 22:34:03,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:03,891 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2023-01-27 22:34:03,891 INFO L131 PetriNetUnfolder]: For 5748/5772 co-relation queries the response was YES. [2023-01-27 22:34:03,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 719 events. 395/719 cut-off events. For 5748/5772 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3385 event pairs, 44 based on Foata normal form. 13/722 useless extension candidates. Maximal degree in co-relation 3028. Up to 352 conditions per place. [2023-01-27 22:34:03,896 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2023-01-27 22:34:03,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2023-01-27 22:34:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:34:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:34:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-01-27 22:34:03,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527007299270073 [2023-01-27 22:34:03,898 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-01-27 22:34:03,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-01-27 22:34:03,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:03,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-01-27 22:34:03,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,900 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 361 transitions. [2023-01-27 22:34:03,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2023-01-27 22:34:03,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-01-27 22:34:03,911 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2023-01-27 22:34:03,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-01-27 22:34:03,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-27 22:34:03,913 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2023-01-27 22:34:03,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:03,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:03,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:03,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:04,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:04,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2130618993, now seen corresponding path program 6 times [2023-01-27 22:34:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88114820] [2023-01-27 22:34:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:04,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88114820] [2023-01-27 22:34:04,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88114820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346419544] [2023-01-27 22:34:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:34:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:04,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:34:04,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:34:04,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:04,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:34:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:04,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346419544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:04,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:04,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 22:34:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173206293] [2023-01-27 22:34:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:34:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:34:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:34:04,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:04,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:04,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:04,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:04,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:04,862 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2023-01-27 22:34:04,862 INFO L131 PetriNetUnfolder]: For 13096/13096 co-relation queries the response was YES. [2023-01-27 22:34:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1287 events. 687/1287 cut-off events. For 13096/13096 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7134 event pairs, 10 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5227. Up to 385 conditions per place. [2023-01-27 22:34:04,870 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2023-01-27 22:34:04,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2023-01-27 22:34:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 22:34:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 22:34:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1425 transitions. [2023-01-27 22:34:04,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-01-27 22:34:04,873 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1425 transitions. [2023-01-27 22:34:04,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1425 transitions. [2023-01-27 22:34:04,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:04,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1425 transitions. [2023-01-27 22:34:04,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.0) internal successors, (1425), 25 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:04,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:04,880 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:04,880 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1425 transitions. [2023-01-27 22:34:04,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2023-01-27 22:34:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-01-27 22:34:04,914 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2023-01-27 22:34:04,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2489, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2023-01-27 22:34:04,915 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-01-27 22:34:04,915 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2023-01-27 22:34:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:04,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:05,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:05,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1283699093, now seen corresponding path program 7 times [2023-01-27 22:34:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:05,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650763669] [2023-01-27 22:34:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650763669] [2023-01-27 22:34:05,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650763669] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151843662] [2023-01-27 22:34:05,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:34:05,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:05,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:05,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:34:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:34:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:05,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:05,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151843662] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:05,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:05,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 22:34:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239175120] [2023-01-27 22:34:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:05,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:34:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:34:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:34:05,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:05,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 2489 flow. Second operand has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:05,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:05,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:05,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:05,802 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2023-01-27 22:34:05,802 INFO L131 PetriNetUnfolder]: For 25200/25200 co-relation queries the response was YES. [2023-01-27 22:34:05,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1177 events. 599/1177 cut-off events. For 25200/25200 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6786 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8462. Up to 334 conditions per place. [2023-01-27 22:34:05,810 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2023-01-27 22:34:05,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2023-01-27 22:34:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 22:34:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 22:34:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1262 transitions. [2023-01-27 22:34:05,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41871267418712677 [2023-01-27 22:34:05,814 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1262 transitions. [2023-01-27 22:34:05,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1262 transitions. [2023-01-27 22:34:05,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:05,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1262 transitions. [2023-01-27 22:34:05,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.36363636363637) internal successors, (1262), 22 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:05,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:05,821 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:05,821 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1262 transitions. [2023-01-27 22:34:05,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2023-01-27 22:34:05,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-01-27 22:34:05,881 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2023-01-27 22:34:05,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2457, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-01-27 22:34:05,883 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-01-27 22:34:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2023-01-27 22:34:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:05,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:05,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 22:34:06,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:06,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash 465738203, now seen corresponding path program 8 times [2023-01-27 22:34:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546452065] [2023-01-27 22:34:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:06,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546452065] [2023-01-27 22:34:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546452065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884791241] [2023-01-27 22:34:06,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:34:06,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:06,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:06,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:34:06,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:34:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 22:34:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884791241] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:06,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-27 22:34:06,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259212709] [2023-01-27 22:34:06,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:06,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:34:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:34:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:34:06,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:06,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 2457 flow. Second operand has 18 states, 18 states have (on average 54.388888888888886) internal successors, (979), 18 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:06,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:06,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:06,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:06,933 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2023-01-27 22:34:06,933 INFO L131 PetriNetUnfolder]: For 41948/41948 co-relation queries the response was YES. [2023-01-27 22:34:06,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11238 conditions, 1554 events. 764/1554 cut-off events. For 41948/41948 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9726 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 9527. Up to 969 conditions per place. [2023-01-27 22:34:06,948 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 189 selfloop transitions, 87 changer transitions 8/284 dead transitions. [2023-01-27 22:34:06,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 284 transitions, 4327 flow [2023-01-27 22:34:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:34:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:34:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1155 transitions. [2023-01-27 22:34:06,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215328467153285 [2023-01-27 22:34:06,953 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1155 transitions. [2023-01-27 22:34:06,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1155 transitions. [2023-01-27 22:34:06,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:06,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1155 transitions. [2023-01-27 22:34:06,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:06,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:06,959 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:06,959 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 20 states and 1155 transitions. [2023-01-27 22:34:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 284 transitions, 4327 flow [2023-01-27 22:34:07,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 284 transitions, 4218 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-01-27 22:34:07,066 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 3396 flow [2023-01-27 22:34:07,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3396, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2023-01-27 22:34:07,066 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2023-01-27 22:34:07,067 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 3396 flow [2023-01-27 22:34:07,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.388888888888886) internal successors, (979), 18 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:07,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:07,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:07,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:07,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:07,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:07,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2109457573, now seen corresponding path program 9 times [2023-01-27 22:34:07,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:07,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488808134] [2023-01-27 22:34:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:07,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488808134] [2023-01-27 22:34:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488808134] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628492826] [2023-01-27 22:34:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:34:07,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:07,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:07,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:07,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:34:07,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:34:07,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:07,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:34:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:07,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628492826] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:07,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:07,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-01-27 22:34:07,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904704972] [2023-01-27 22:34:07,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:07,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:34:07,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:34:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:34:07,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:07,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 3396 flow. Second operand has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:07,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:07,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:07,913 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2023-01-27 22:34:07,913 INFO L131 PetriNetUnfolder]: For 43638/43638 co-relation queries the response was YES. [2023-01-27 22:34:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 1536 events. 756/1536 cut-off events. For 43638/43638 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9681 event pairs, 25 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 10773. Up to 468 conditions per place. [2023-01-27 22:34:07,928 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 153 selfloop transitions, 120 changer transitions 9/282 dead transitions. [2023-01-27 22:34:07,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 282 transitions, 4856 flow [2023-01-27 22:34:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:34:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:34:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1135 transitions. [2023-01-27 22:34:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142335766423358 [2023-01-27 22:34:07,930 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1135 transitions. [2023-01-27 22:34:07,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1135 transitions. [2023-01-27 22:34:07,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:07,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1135 transitions. [2023-01-27 22:34:07,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:07,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:07,939 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:07,939 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 3396 flow. Second operand 20 states and 1135 transitions. [2023-01-27 22:34:07,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 282 transitions, 4856 flow [2023-01-27 22:34:08,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 4488 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-01-27 22:34:08,038 INFO L231 Difference]: Finished difference. Result has 153 places, 224 transitions, 3656 flow [2023-01-27 22:34:08,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3656, PETRI_PLACES=153, PETRI_TRANSITIONS=224} [2023-01-27 22:34:08,039 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-01-27 22:34:08,039 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 224 transitions, 3656 flow [2023-01-27 22:34:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:08,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:08,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:08,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 22:34:08,244 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:08,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1117413703, now seen corresponding path program 10 times [2023-01-27 22:34:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239450384] [2023-01-27 22:34:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239450384] [2023-01-27 22:34:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239450384] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878109765] [2023-01-27 22:34:08,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:34:08,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:08,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:08,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:34:08,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:34:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:34:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:08,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878109765] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:08,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:08,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-01-27 22:34:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658375854] [2023-01-27 22:34:08,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:34:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:34:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:34:08,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:08,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 224 transitions, 3656 flow. Second operand has 14 states, 14 states have (on average 54.642857142857146) internal successors, (765), 14 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:08,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:08,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:08,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:08,962 INFO L130 PetriNetUnfolder]: 803/1611 cut-off events. [2023-01-27 22:34:08,962 INFO L131 PetriNetUnfolder]: For 63986/63986 co-relation queries the response was YES. [2023-01-27 22:34:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 1611 events. 803/1611 cut-off events. For 63986/63986 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10101 event pairs, 33 based on Foata normal form. 46/1657 useless extension candidates. Maximal degree in co-relation 11549. Up to 407 conditions per place. [2023-01-27 22:34:08,980 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 167 selfloop transitions, 136 changer transitions 52/355 dead transitions. [2023-01-27 22:34:08,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 355 transitions, 5940 flow [2023-01-27 22:34:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:34:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:34:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1710 transitions. [2023-01-27 22:34:08,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-01-27 22:34:08,982 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1710 transitions. [2023-01-27 22:34:08,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1710 transitions. [2023-01-27 22:34:08,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:08,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1710 transitions. [2023-01-27 22:34:08,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.0) internal successors, (1710), 30 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:08,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:08,989 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:08,989 INFO L175 Difference]: Start difference. First operand has 153 places, 224 transitions, 3656 flow. Second operand 30 states and 1710 transitions. [2023-01-27 22:34:08,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 355 transitions, 5940 flow [2023-01-27 22:34:09,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 355 transitions, 5667 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-01-27 22:34:09,098 INFO L231 Difference]: Finished difference. Result has 185 places, 250 transitions, 4313 flow [2023-01-27 22:34:09,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4313, PETRI_PLACES=185, PETRI_TRANSITIONS=250} [2023-01-27 22:34:09,099 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-01-27 22:34:09,099 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 250 transitions, 4313 flow [2023-01-27 22:34:09,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.642857142857146) internal successors, (765), 14 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:09,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:09,099 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:09,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 22:34:09,304 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:09,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 715119095, now seen corresponding path program 11 times [2023-01-27 22:34:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:09,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306882003] [2023-01-27 22:34:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:09,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306882003] [2023-01-27 22:34:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306882003] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476080007] [2023-01-27 22:34:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:34:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:09,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:09,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:34:09,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 22:34:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:34:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:09,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:09,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476080007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:09,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:09,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-01-27 22:34:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314109653] [2023-01-27 22:34:09,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:34:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:34:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:34:09,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:09,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 250 transitions, 4313 flow. Second operand has 25 states, 25 states have (on average 53.8) internal successors, (1345), 25 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:09,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:09,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:11,052 INFO L130 PetriNetUnfolder]: 1235/2432 cut-off events. [2023-01-27 22:34:11,052 INFO L131 PetriNetUnfolder]: For 178071/178071 co-relation queries the response was YES. [2023-01-27 22:34:11,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25740 conditions, 2432 events. 1235/2432 cut-off events. For 178071/178071 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16197 event pairs, 10 based on Foata normal form. 38/2470 useless extension candidates. Maximal degree in co-relation 24794. Up to 639 conditions per place. [2023-01-27 22:34:11,073 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 208 selfloop transitions, 385 changer transitions 17/610 dead transitions. [2023-01-27 22:34:11,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 610 transitions, 11431 flow [2023-01-27 22:34:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 22:34:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 22:34:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2934 transitions. [2023-01-27 22:34:11,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199227136109918 [2023-01-27 22:34:11,076 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2934 transitions. [2023-01-27 22:34:11,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2934 transitions. [2023-01-27 22:34:11,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:11,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2934 transitions. [2023-01-27 22:34:11,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.529411764705884) internal successors, (2934), 51 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:11,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:11,086 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:11,086 INFO L175 Difference]: Start difference. First operand has 185 places, 250 transitions, 4313 flow. Second operand 51 states and 2934 transitions. [2023-01-27 22:34:11,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 610 transitions, 11431 flow [2023-01-27 22:34:11,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 610 transitions, 10906 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-01-27 22:34:11,389 INFO L231 Difference]: Finished difference. Result has 226 places, 442 transitions, 9865 flow [2023-01-27 22:34:11,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9865, PETRI_PLACES=226, PETRI_TRANSITIONS=442} [2023-01-27 22:34:11,390 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-01-27 22:34:11,390 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 442 transitions, 9865 flow [2023-01-27 22:34:11,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.8) internal successors, (1345), 25 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:11,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:11,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:11,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:11,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 22:34:11,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:11,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1058407358, now seen corresponding path program 12 times [2023-01-27 22:34:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128484500] [2023-01-27 22:34:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:11,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128484500] [2023-01-27 22:34:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128484500] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270886727] [2023-01-27 22:34:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:34:11,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:11,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:11,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:34:11,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:34:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 22:34:11,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:11,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270886727] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:11,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:11,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-01-27 22:34:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693912966] [2023-01-27 22:34:11,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 22:34:11,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 22:34:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-27 22:34:11,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-27 22:34:11,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 442 transitions, 9865 flow. Second operand has 12 states, 12 states have (on average 65.58333333333333) internal successors, (787), 12 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:11,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:11,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-27 22:34:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:12,864 INFO L130 PetriNetUnfolder]: 1938/3770 cut-off events. [2023-01-27 22:34:12,864 INFO L131 PetriNetUnfolder]: For 282085/282089 co-relation queries the response was YES. [2023-01-27 22:34:12,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42742 conditions, 3770 events. 1938/3770 cut-off events. For 282085/282089 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27206 event pairs, 168 based on Foata normal form. 7/3770 useless extension candidates. Maximal degree in co-relation 41840. Up to 1612 conditions per place. [2023-01-27 22:34:12,933 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 442 selfloop transitions, 257 changer transitions 28/736 dead transitions. [2023-01-27 22:34:12,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 736 transitions, 17988 flow [2023-01-27 22:34:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:34:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:34:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2023-01-27 22:34:12,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291970802919708 [2023-01-27 22:34:12,934 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 435 transitions. [2023-01-27 22:34:12,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 435 transitions. [2023-01-27 22:34:12,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:12,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 435 transitions. [2023-01-27 22:34:12,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:12,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:12,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:12,935 INFO L175 Difference]: Start difference. First operand has 226 places, 442 transitions, 9865 flow. Second operand 6 states and 435 transitions. [2023-01-27 22:34:12,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 736 transitions, 17988 flow [2023-01-27 22:34:14,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 736 transitions, 12584 flow, removed 2614 selfloop flow, removed 3 redundant places. [2023-01-27 22:34:14,848 INFO L231 Difference]: Finished difference. Result has 231 places, 588 transitions, 10758 flow [2023-01-27 22:34:14,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10758, PETRI_PLACES=231, PETRI_TRANSITIONS=588} [2023-01-27 22:34:14,848 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-01-27 22:34:14,848 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 588 transitions, 10758 flow [2023-01-27 22:34:14,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 65.58333333333333) internal successors, (787), 12 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:14,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:14,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:14,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:15,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 22:34:15,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:15,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1587282354, now seen corresponding path program 13 times [2023-01-27 22:34:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:15,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951775701] [2023-01-27 22:34:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:15,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951775701] [2023-01-27 22:34:15,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951775701] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719457439] [2023-01-27 22:34:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:34:15,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:15,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:15,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:34:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:34:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:15,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719457439] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:15,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 22:34:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248187830] [2023-01-27 22:34:15,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:34:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:34:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:34:15,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:15,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 588 transitions, 10758 flow. Second operand has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:15,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:15,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:15,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:16,538 INFO L130 PetriNetUnfolder]: 1896/3701 cut-off events. [2023-01-27 22:34:16,539 INFO L131 PetriNetUnfolder]: For 45867/45867 co-relation queries the response was YES. [2023-01-27 22:34:16,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 3701 events. 1896/3701 cut-off events. For 45867/45867 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26534 event pairs, 40 based on Foata normal form. 68/3769 useless extension candidates. Maximal degree in co-relation 26290. Up to 1102 conditions per place. [2023-01-27 22:34:16,562 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 217 selfloop transitions, 451 changer transitions 20/688 dead transitions. [2023-01-27 22:34:16,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 688 transitions, 13128 flow [2023-01-27 22:34:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 22:34:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 22:34:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1385 transitions. [2023-01-27 22:34:16,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212287104622871 [2023-01-27 22:34:16,566 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1385 transitions. [2023-01-27 22:34:16,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1385 transitions. [2023-01-27 22:34:16,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:16,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1385 transitions. [2023-01-27 22:34:16,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.708333333333336) internal successors, (1385), 24 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:16,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:16,570 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:16,570 INFO L175 Difference]: Start difference. First operand has 231 places, 588 transitions, 10758 flow. Second operand 24 states and 1385 transitions. [2023-01-27 22:34:16,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 688 transitions, 13128 flow [2023-01-27 22:34:16,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 688 transitions, 12939 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-01-27 22:34:16,858 INFO L231 Difference]: Finished difference. Result has 248 places, 592 transitions, 11738 flow [2023-01-27 22:34:16,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11738, PETRI_PLACES=248, PETRI_TRANSITIONS=592} [2023-01-27 22:34:16,858 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-01-27 22:34:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 592 transitions, 11738 flow [2023-01-27 22:34:16,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:16,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:16,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:16,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:17,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:17,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:17,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1502044534, now seen corresponding path program 14 times [2023-01-27 22:34:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:17,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430286353] [2023-01-27 22:34:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430286353] [2023-01-27 22:34:17,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430286353] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256944184] [2023-01-27 22:34:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:34:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:17,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:17,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:17,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:34:17,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:34:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:17,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:34:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:17,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256944184] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:17,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 22:34:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429309673] [2023-01-27 22:34:17,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:17,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:34:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:34:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:34:17,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:17,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 592 transitions, 11738 flow. Second operand has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:17,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:17,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:17,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:18,651 INFO L130 PetriNetUnfolder]: 2183/4264 cut-off events. [2023-01-27 22:34:18,651 INFO L131 PetriNetUnfolder]: For 58092/58092 co-relation queries the response was YES. [2023-01-27 22:34:18,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31312 conditions, 4264 events. 2183/4264 cut-off events. For 58092/58092 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31626 event pairs, 51 based on Foata normal form. 104/4368 useless extension candidates. Maximal degree in co-relation 30827. Up to 1652 conditions per place. [2023-01-27 22:34:18,680 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 285 selfloop transitions, 513 changer transitions 4/802 dead transitions. [2023-01-27 22:34:18,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 802 transitions, 16001 flow [2023-01-27 22:34:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 22:34:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 22:34:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1497 transitions. [2023-01-27 22:34:18,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42026951151038744 [2023-01-27 22:34:18,682 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1497 transitions. [2023-01-27 22:34:18,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1497 transitions. [2023-01-27 22:34:18,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:18,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1497 transitions. [2023-01-27 22:34:18,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.57692307692308) internal successors, (1497), 26 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:18,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:18,686 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:18,686 INFO L175 Difference]: Start difference. First operand has 248 places, 592 transitions, 11738 flow. Second operand 26 states and 1497 transitions. [2023-01-27 22:34:18,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 802 transitions, 16001 flow [2023-01-27 22:34:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 802 transitions, 15806 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-01-27 22:34:19,105 INFO L231 Difference]: Finished difference. Result has 270 places, 680 transitions, 14937 flow [2023-01-27 22:34:19,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14937, PETRI_PLACES=270, PETRI_TRANSITIONS=680} [2023-01-27 22:34:19,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-01-27 22:34:19,106 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 680 transitions, 14937 flow [2023-01-27 22:34:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:19,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:19,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:19,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 22:34:19,311 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:19,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2011961230, now seen corresponding path program 15 times [2023-01-27 22:34:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:19,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586885629] [2023-01-27 22:34:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:19,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586885629] [2023-01-27 22:34:19,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586885629] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:19,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922559541] [2023-01-27 22:34:19,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:34:19,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:19,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:19,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:19,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:34:19,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:34:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:19,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:34:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:19,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922559541] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:19,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 22:34:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847957713] [2023-01-27 22:34:19,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:19,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:34:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:34:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:34:19,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:19,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 680 transitions, 14937 flow. Second operand has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:19,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:19,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:19,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:21,272 INFO L130 PetriNetUnfolder]: 2307/4500 cut-off events. [2023-01-27 22:34:21,272 INFO L131 PetriNetUnfolder]: For 80936/80936 co-relation queries the response was YES. [2023-01-27 22:34:21,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36057 conditions, 4500 events. 2307/4500 cut-off events. For 80936/80936 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33669 event pairs, 7 based on Foata normal form. 76/4576 useless extension candidates. Maximal degree in co-relation 35504. Up to 905 conditions per place. [2023-01-27 22:34:21,308 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 276 selfloop transitions, 604 changer transitions 11/891 dead transitions. [2023-01-27 22:34:21,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 891 transitions, 19573 flow [2023-01-27 22:34:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 22:34:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 22:34:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1833 transitions. [2023-01-27 22:34:21,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41811131386861317 [2023-01-27 22:34:21,310 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1833 transitions. [2023-01-27 22:34:21,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1833 transitions. [2023-01-27 22:34:21,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:21,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1833 transitions. [2023-01-27 22:34:21,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.28125) internal successors, (1833), 32 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:21,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:21,315 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:21,315 INFO L175 Difference]: Start difference. First operand has 270 places, 680 transitions, 14937 flow. Second operand 32 states and 1833 transitions. [2023-01-27 22:34:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 891 transitions, 19573 flow [2023-01-27 22:34:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 891 transitions, 19349 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-01-27 22:34:21,984 INFO L231 Difference]: Finished difference. Result has 296 places, 754 transitions, 17585 flow [2023-01-27 22:34:21,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=14731, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17585, PETRI_PLACES=296, PETRI_TRANSITIONS=754} [2023-01-27 22:34:21,985 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-01-27 22:34:21,985 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 754 transitions, 17585 flow [2023-01-27 22:34:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:21,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:21,985 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:21,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-27 22:34:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 22:34:22,190 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:22,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 295045338, now seen corresponding path program 16 times [2023-01-27 22:34:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582094270] [2023-01-27 22:34:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582094270] [2023-01-27 22:34:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582094270] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669146647] [2023-01-27 22:34:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:34:22,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:22,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:22,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:34:22,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:34:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 22:34:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:22,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669146647] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:22,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:22,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-27 22:34:22,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224600415] [2023-01-27 22:34:22,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:34:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:34:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:34:22,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:22,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 754 transitions, 17585 flow. Second operand has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:22,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:22,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:22,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:24,273 INFO L130 PetriNetUnfolder]: 2667/5269 cut-off events. [2023-01-27 22:34:24,273 INFO L131 PetriNetUnfolder]: For 105280/105280 co-relation queries the response was YES. [2023-01-27 22:34:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44006 conditions, 5269 events. 2667/5269 cut-off events. For 105280/105280 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 41141 event pairs, 55 based on Foata normal form. 90/5359 useless extension candidates. Maximal degree in co-relation 43434. Up to 1397 conditions per place. [2023-01-27 22:34:24,309 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 462 selfloop transitions, 562 changer transitions 17/1041 dead transitions. [2023-01-27 22:34:24,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1041 transitions, 23867 flow [2023-01-27 22:34:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-27 22:34:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-27 22:34:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2181 transitions. [2023-01-27 22:34:24,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189396849788705 [2023-01-27 22:34:24,311 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2181 transitions. [2023-01-27 22:34:24,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2181 transitions. [2023-01-27 22:34:24,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:24,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2181 transitions. [2023-01-27 22:34:24,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 57.39473684210526) internal successors, (2181), 38 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:24,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:24,317 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:24,317 INFO L175 Difference]: Start difference. First operand has 296 places, 754 transitions, 17585 flow. Second operand 38 states and 2181 transitions. [2023-01-27 22:34:24,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1041 transitions, 23867 flow [2023-01-27 22:34:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1041 transitions, 22444 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-01-27 22:34:25,124 INFO L231 Difference]: Finished difference. Result has 325 places, 861 transitions, 20641 flow [2023-01-27 22:34:25,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=16332, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=20641, PETRI_PLACES=325, PETRI_TRANSITIONS=861} [2023-01-27 22:34:25,124 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-01-27 22:34:25,125 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 861 transitions, 20641 flow [2023-01-27 22:34:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:25,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:25,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:25,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 22:34:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:25,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:25,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 344505820, now seen corresponding path program 17 times [2023-01-27 22:34:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937516246] [2023-01-27 22:34:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937516246] [2023-01-27 22:34:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937516246] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189579232] [2023-01-27 22:34:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:34:25,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:25,424 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:34:25,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:34:25,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:34:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:25,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189579232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:25,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:25,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-27 22:34:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49917059] [2023-01-27 22:34:25,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:25,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:34:25,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:34:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:34:25,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:25,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 861 transitions, 20641 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:25,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:25,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:25,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:27,981 INFO L130 PetriNetUnfolder]: 3133/6126 cut-off events. [2023-01-27 22:34:27,981 INFO L131 PetriNetUnfolder]: For 134558/134558 co-relation queries the response was YES. [2023-01-27 22:34:28,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52873 conditions, 6126 events. 3133/6126 cut-off events. For 134558/134558 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 48990 event pairs, 79 based on Foata normal form. 56/6182 useless extension candidates. Maximal degree in co-relation 52220. Up to 3060 conditions per place. [2023-01-27 22:34:28,027 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 494 selfloop transitions, 657 changer transitions 15/1166 dead transitions. [2023-01-27 22:34:28,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1166 transitions, 28460 flow [2023-01-27 22:34:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 22:34:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 22:34:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1613 transitions. [2023-01-27 22:34:28,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204900938477581 [2023-01-27 22:34:28,029 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1613 transitions. [2023-01-27 22:34:28,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1613 transitions. [2023-01-27 22:34:28,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:28,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1613 transitions. [2023-01-27 22:34:28,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.607142857142854) internal successors, (1613), 28 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:28,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:28,034 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:28,034 INFO L175 Difference]: Start difference. First operand has 325 places, 861 transitions, 20641 flow. Second operand 28 states and 1613 transitions. [2023-01-27 22:34:28,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1166 transitions, 28460 flow [2023-01-27 22:34:29,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1166 transitions, 27809 flow, removed 143 selfloop flow, removed 25 redundant places. [2023-01-27 22:34:29,147 INFO L231 Difference]: Finished difference. Result has 338 places, 1024 transitions, 26136 flow [2023-01-27 22:34:29,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=20148, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26136, PETRI_PLACES=338, PETRI_TRANSITIONS=1024} [2023-01-27 22:34:29,147 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-01-27 22:34:29,147 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1024 transitions, 26136 flow [2023-01-27 22:34:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:29,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:29,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:29,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 22:34:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:29,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:29,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:29,352 INFO L85 PathProgramCache]: Analyzing trace with hash -764395770, now seen corresponding path program 18 times [2023-01-27 22:34:29,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:29,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873197533] [2023-01-27 22:34:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873197533] [2023-01-27 22:34:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873197533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140789661] [2023-01-27 22:34:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:34:29,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:29,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:29,448 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:29,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 22:34:29,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:34:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:34:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:29,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140789661] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:29,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-27 22:34:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405058647] [2023-01-27 22:34:29,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:29,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:34:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:34:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:34:29,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:29,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1024 transitions, 26136 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:29,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:29,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:29,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:32,327 INFO L130 PetriNetUnfolder]: 3703/7260 cut-off events. [2023-01-27 22:34:32,327 INFO L131 PetriNetUnfolder]: For 189224/189224 co-relation queries the response was YES. [2023-01-27 22:34:32,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 7260 events. 3703/7260 cut-off events. For 189224/189224 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59810 event pairs, 105 based on Foata normal form. 168/7428 useless extension candidates. Maximal degree in co-relation 65752. Up to 2424 conditions per place. [2023-01-27 22:34:32,393 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 432 selfloop transitions, 909 changer transitions 20/1361 dead transitions. [2023-01-27 22:34:32,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1361 transitions, 35664 flow [2023-01-27 22:34:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 22:34:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 22:34:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1778 transitions. [2023-01-27 22:34:32,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186484577348717 [2023-01-27 22:34:32,394 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1778 transitions. [2023-01-27 22:34:32,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1778 transitions. [2023-01-27 22:34:32,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:32,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1778 transitions. [2023-01-27 22:34:32,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.354838709677416) internal successors, (1778), 31 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:32,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:32,399 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:32,399 INFO L175 Difference]: Start difference. First operand has 338 places, 1024 transitions, 26136 flow. Second operand 31 states and 1778 transitions. [2023-01-27 22:34:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1361 transitions, 35664 flow [2023-01-27 22:34:34,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1361 transitions, 35350 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-01-27 22:34:34,138 INFO L231 Difference]: Finished difference. Result has 369 places, 1213 transitions, 33651 flow [2023-01-27 22:34:34,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33651, PETRI_PLACES=369, PETRI_TRANSITIONS=1213} [2023-01-27 22:34:34,139 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-01-27 22:34:34,139 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1213 transitions, 33651 flow [2023-01-27 22:34:34,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:34,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:34,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:34,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:34,346 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:34,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1978622190, now seen corresponding path program 19 times [2023-01-27 22:34:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:34,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316297718] [2023-01-27 22:34:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316297718] [2023-01-27 22:34:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316297718] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169065598] [2023-01-27 22:34:34,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:34:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:34,498 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:34,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:34:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 22:34:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:34,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:34,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169065598] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:34,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:34,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-01-27 22:34:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182646325] [2023-01-27 22:34:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:34:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:34:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:34:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:34,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1213 transitions, 33651 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:34,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:34,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:34,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:37,997 INFO L130 PetriNetUnfolder]: 4062/8012 cut-off events. [2023-01-27 22:34:37,997 INFO L131 PetriNetUnfolder]: For 244787/244787 co-relation queries the response was YES. [2023-01-27 22:34:38,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78412 conditions, 8012 events. 4062/8012 cut-off events. For 244787/244787 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67551 event pairs, 305 based on Foata normal form. 136/8148 useless extension candidates. Maximal degree in co-relation 77443. Up to 6222 conditions per place. [2023-01-27 22:34:38,076 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1169 selfloop transitions, 271 changer transitions 17/1457 dead transitions. [2023-01-27 22:34:38,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1457 transitions, 41399 flow [2023-01-27 22:34:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 22:34:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 22:34:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1612 transitions. [2023-01-27 22:34:38,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42022940563086547 [2023-01-27 22:34:38,078 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1612 transitions. [2023-01-27 22:34:38,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1612 transitions. [2023-01-27 22:34:38,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:38,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1612 transitions. [2023-01-27 22:34:38,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.57142857142857) internal successors, (1612), 28 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:38,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:38,082 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:38,082 INFO L175 Difference]: Start difference. First operand has 369 places, 1213 transitions, 33651 flow. Second operand 28 states and 1612 transitions. [2023-01-27 22:34:38,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1457 transitions, 41399 flow [2023-01-27 22:34:40,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1457 transitions, 40967 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-01-27 22:34:40,681 INFO L231 Difference]: Finished difference. Result has 393 places, 1327 transitions, 37600 flow [2023-01-27 22:34:40,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=33219, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=37600, PETRI_PLACES=393, PETRI_TRANSITIONS=1327} [2023-01-27 22:34:40,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-01-27 22:34:40,682 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1327 transitions, 37600 flow [2023-01-27 22:34:40,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:40,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:40,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:40,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-27 22:34:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 22:34:40,887 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:40,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1120342306, now seen corresponding path program 20 times [2023-01-27 22:34:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126708887] [2023-01-27 22:34:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:40,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:40,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126708887] [2023-01-27 22:34:40,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126708887] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:40,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288227572] [2023-01-27 22:34:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:34:40,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:40,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:40,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:34:41,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:34:41,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:41,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 22:34:41,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:41,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288227572] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:41,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-01-27 22:34:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977273493] [2023-01-27 22:34:41,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:41,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:34:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:34:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:34:41,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:41,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1327 transitions, 37600 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:41,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:41,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:41,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:44,713 INFO L130 PetriNetUnfolder]: 3993/7827 cut-off events. [2023-01-27 22:34:44,713 INFO L131 PetriNetUnfolder]: For 248638/248638 co-relation queries the response was YES. [2023-01-27 22:34:44,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77771 conditions, 7827 events. 3993/7827 cut-off events. For 248638/248638 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 65373 event pairs, 49 based on Foata normal form. 18/7845 useless extension candidates. Maximal degree in co-relation 76868. Up to 2303 conditions per place. [2023-01-27 22:34:44,795 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 807 selfloop transitions, 610 changer transitions 15/1432 dead transitions. [2023-01-27 22:34:44,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1432 transitions, 41327 flow [2023-01-27 22:34:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 22:34:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 22:34:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1868 transitions. [2023-01-27 22:34:44,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131829241318292 [2023-01-27 22:34:44,797 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1868 transitions. [2023-01-27 22:34:44,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1868 transitions. [2023-01-27 22:34:44,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:44,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1868 transitions. [2023-01-27 22:34:44,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.60606060606061) internal successors, (1868), 33 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:44,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:44,801 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:44,801 INFO L175 Difference]: Start difference. First operand has 393 places, 1327 transitions, 37600 flow. Second operand 33 states and 1868 transitions. [2023-01-27 22:34:44,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1432 transitions, 41327 flow [2023-01-27 22:34:47,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1432 transitions, 40963 flow, removed 111 selfloop flow, removed 15 redundant places. [2023-01-27 22:34:47,420 INFO L231 Difference]: Finished difference. Result has 414 places, 1332 transitions, 38544 flow [2023-01-27 22:34:47,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=36823, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38544, PETRI_PLACES=414, PETRI_TRANSITIONS=1332} [2023-01-27 22:34:47,421 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-01-27 22:34:47,421 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1332 transitions, 38544 flow [2023-01-27 22:34:47,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:47,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:47,421 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:47,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 22:34:47,622 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:47,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash -198606537, now seen corresponding path program 21 times [2023-01-27 22:34:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:47,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557321778] [2023-01-27 22:34:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557321778] [2023-01-27 22:34:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557321778] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182428398] [2023-01-27 22:34:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:34:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:47,749 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:47,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:34:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 22:34:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 22:34:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:47,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182428398] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:48,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:48,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-27 22:34:48,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067639960] [2023-01-27 22:34:48,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 22:34:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 22:34:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-01-27 22:34:48,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:48,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1332 transitions, 38544 flow. Second operand has 29 states, 29 states have (on average 53.96551724137931) internal successors, (1565), 29 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:48,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:48,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:48,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:34:53,769 INFO L130 PetriNetUnfolder]: 5093/10127 cut-off events. [2023-01-27 22:34:53,769 INFO L131 PetriNetUnfolder]: For 335973/335973 co-relation queries the response was YES. [2023-01-27 22:34:53,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102245 conditions, 10127 events. 5093/10127 cut-off events. For 335973/335973 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 88862 event pairs, 11 based on Foata normal form. 180/10307 useless extension candidates. Maximal degree in co-relation 101503. Up to 2141 conditions per place. [2023-01-27 22:34:53,873 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 509 selfloop transitions, 1452 changer transitions 34/1995 dead transitions. [2023-01-27 22:34:53,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1995 transitions, 55850 flow [2023-01-27 22:34:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-01-27 22:34:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-01-27 22:34:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3616 transitions. [2023-01-27 22:34:53,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41895492990383504 [2023-01-27 22:34:53,877 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3616 transitions. [2023-01-27 22:34:53,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3616 transitions. [2023-01-27 22:34:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:34:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3616 transitions. [2023-01-27 22:34:53,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.3968253968254) internal successors, (3616), 63 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:53,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:53,885 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:53,885 INFO L175 Difference]: Start difference. First operand has 414 places, 1332 transitions, 38544 flow. Second operand 63 states and 3616 transitions. [2023-01-27 22:34:53,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1995 transitions, 55850 flow [2023-01-27 22:34:57,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1995 transitions, 54757 flow, removed 126 selfloop flow, removed 16 redundant places. [2023-01-27 22:34:57,683 INFO L231 Difference]: Finished difference. Result has 472 places, 1687 transitions, 50830 flow [2023-01-27 22:34:57,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=37603, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=50830, PETRI_PLACES=472, PETRI_TRANSITIONS=1687} [2023-01-27 22:34:57,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-01-27 22:34:57,684 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1687 transitions, 50830 flow [2023-01-27 22:34:57,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 53.96551724137931) internal successors, (1565), 29 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:57,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:34:57,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:34:57,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 22:34:57,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:57,889 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:34:57,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:34:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash 175450710, now seen corresponding path program 22 times [2023-01-27 22:34:57,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:34:57,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616521400] [2023-01-27 22:34:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:34:57,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:34:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:34:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:34:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:34:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616521400] [2023-01-27 22:34:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616521400] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:34:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732413313] [2023-01-27 22:34:58,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:34:58,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:34:58,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:34:58,025 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:34:58,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:34:58,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:34:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:34:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 22:34:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:34:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:58,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:34:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:34:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732413313] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:34:58,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:34:58,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-01-27 22:34:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102355931] [2023-01-27 22:34:58,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:34:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:34:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:34:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:34:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:34:58,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:34:58,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1687 transitions, 50830 flow. Second operand has 17 states, 17 states have (on average 54.35294117647059) internal successors, (924), 17 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:34:58,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:34:58,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:34:58,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:35:03,875 INFO L130 PetriNetUnfolder]: 5147/10159 cut-off events. [2023-01-27 22:35:03,876 INFO L131 PetriNetUnfolder]: For 366730/366730 co-relation queries the response was YES. [2023-01-27 22:35:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109570 conditions, 10159 events. 5147/10159 cut-off events. For 366730/366730 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88392 event pairs, 123 based on Foata normal form. 104/10263 useless extension candidates. Maximal degree in co-relation 108420. Up to 2922 conditions per place. [2023-01-27 22:35:04,001 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 966 selfloop transitions, 926 changer transitions 37/1929 dead transitions. [2023-01-27 22:35:04,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1929 transitions, 58875 flow [2023-01-27 22:35:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 22:35:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 22:35:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2288 transitions. [2023-01-27 22:35:04,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41751824817518246 [2023-01-27 22:35:04,004 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2288 transitions. [2023-01-27 22:35:04,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2288 transitions. [2023-01-27 22:35:04,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:35:04,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2288 transitions. [2023-01-27 22:35:04,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.2) internal successors, (2288), 40 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:04,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:04,010 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:04,010 INFO L175 Difference]: Start difference. First operand has 472 places, 1687 transitions, 50830 flow. Second operand 40 states and 2288 transitions. [2023-01-27 22:35:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1929 transitions, 58875 flow [2023-01-27 22:35:08,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1929 transitions, 57886 flow, removed 399 selfloop flow, removed 18 redundant places. [2023-01-27 22:35:08,109 INFO L231 Difference]: Finished difference. Result has 506 places, 1780 transitions, 54982 flow [2023-01-27 22:35:08,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=49860, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54982, PETRI_PLACES=506, PETRI_TRANSITIONS=1780} [2023-01-27 22:35:08,111 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-01-27 22:35:08,111 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1780 transitions, 54982 flow [2023-01-27 22:35:08,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.35294117647059) internal successors, (924), 17 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:08,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:35:08,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:35:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 22:35:08,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:35:08,314 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:35:08,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:35:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -844978902, now seen corresponding path program 23 times [2023-01-27 22:35:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:35:08,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388155787] [2023-01-27 22:35:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:35:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:35:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:35:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:08,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:35:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388155787] [2023-01-27 22:35:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388155787] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:35:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702002891] [2023-01-27 22:35:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:35:08,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:35:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:35:08,428 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:35:08,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 22:35:08,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-27 22:35:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:35:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:35:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:35:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:08,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:35:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:08,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702002891] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:35:08,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:35:08,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-01-27 22:35:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055525759] [2023-01-27 22:35:08,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:35:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:35:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:35:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:35:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:35:08,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:35:08,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1780 transitions, 54982 flow. Second operand has 23 states, 23 states have (on average 53.65217391304348) internal successors, (1234), 23 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:08,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:35:08,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:35:08,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:35:15,553 INFO L130 PetriNetUnfolder]: 5828/11569 cut-off events. [2023-01-27 22:35:15,553 INFO L131 PetriNetUnfolder]: For 464965/464965 co-relation queries the response was YES. [2023-01-27 22:35:15,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128173 conditions, 11569 events. 5828/11569 cut-off events. For 464965/464965 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 102784 event pairs, 227 based on Foata normal form. 448/12017 useless extension candidates. Maximal degree in co-relation 127749. Up to 3242 conditions per place. [2023-01-27 22:35:15,705 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 750 selfloop transitions, 1405 changer transitions 35/2190 dead transitions. [2023-01-27 22:35:15,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2190 transitions, 69908 flow [2023-01-27 22:35:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 22:35:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 22:35:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2001 transitions. [2023-01-27 22:35:15,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173096976016684 [2023-01-27 22:35:15,707 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2001 transitions. [2023-01-27 22:35:15,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2001 transitions. [2023-01-27 22:35:15,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:35:15,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2001 transitions. [2023-01-27 22:35:15,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.17142857142857) internal successors, (2001), 35 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:15,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:15,712 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:15,712 INFO L175 Difference]: Start difference. First operand has 506 places, 1780 transitions, 54982 flow. Second operand 35 states and 2001 transitions. [2023-01-27 22:35:15,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2190 transitions, 69908 flow [2023-01-27 22:35:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2190 transitions, 67715 flow, removed 249 selfloop flow, removed 13 redundant places. [2023-01-27 22:35:20,875 INFO L231 Difference]: Finished difference. Result has 532 places, 1996 transitions, 65679 flow [2023-01-27 22:35:20,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=53005, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=65679, PETRI_PLACES=532, PETRI_TRANSITIONS=1996} [2023-01-27 22:35:20,876 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-01-27 22:35:20,876 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1996 transitions, 65679 flow [2023-01-27 22:35:20,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.65217391304348) internal successors, (1234), 23 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:20,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:35:20,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:35:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 22:35:21,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 22:35:21,077 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:35:21,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:35:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1262507224, now seen corresponding path program 24 times [2023-01-27 22:35:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:35:21,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91348269] [2023-01-27 22:35:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:35:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:35:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:35:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:35:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91348269] [2023-01-27 22:35:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91348269] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:35:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50944085] [2023-01-27 22:35:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:35:21,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:35:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:35:21,198 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:35:21,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 22:35:21,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 22:35:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:35:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:35:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:35:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:21,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:35:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:21,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50944085] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:35:21,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:35:21,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-01-27 22:35:21,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268507795] [2023-01-27 22:35:21,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:35:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:35:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:35:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:35:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:35:21,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:35:21,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1996 transitions, 65679 flow. Second operand has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:21,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:35:21,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:35:21,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:35:28,991 INFO L130 PetriNetUnfolder]: 6319/12549 cut-off events. [2023-01-27 22:35:28,991 INFO L131 PetriNetUnfolder]: For 547009/547009 co-relation queries the response was YES. [2023-01-27 22:35:29,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148021 conditions, 12549 events. 6319/12549 cut-off events. For 547009/547009 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 112724 event pairs, 533 based on Foata normal form. 240/12789 useless extension candidates. Maximal degree in co-relation 147322. Up to 9914 conditions per place. [2023-01-27 22:35:29,152 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 1858 selfloop transitions, 433 changer transitions 18/2309 dead transitions. [2023-01-27 22:35:29,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2309 transitions, 78847 flow [2023-01-27 22:35:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 22:35:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 22:35:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1385 transitions. [2023-01-27 22:35:29,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212287104622871 [2023-01-27 22:35:29,154 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1385 transitions. [2023-01-27 22:35:29,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1385 transitions. [2023-01-27 22:35:29,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:35:29,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1385 transitions. [2023-01-27 22:35:29,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.708333333333336) internal successors, (1385), 24 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:29,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:29,157 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:29,157 INFO L175 Difference]: Start difference. First operand has 532 places, 1996 transitions, 65679 flow. Second operand 24 states and 1385 transitions. [2023-01-27 22:35:29,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2309 transitions, 78847 flow [2023-01-27 22:35:36,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2309 transitions, 77988 flow, removed 348 selfloop flow, removed 14 redundant places. [2023-01-27 22:35:36,258 INFO L231 Difference]: Finished difference. Result has 552 places, 2179 transitions, 73089 flow [2023-01-27 22:35:36,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64850, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73089, PETRI_PLACES=552, PETRI_TRANSITIONS=2179} [2023-01-27 22:35:36,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-01-27 22:35:36,259 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2179 transitions, 73089 flow [2023-01-27 22:35:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:35:36,260 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:35:36,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-27 22:35:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 22:35:36,461 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:35:36,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:35:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1865710427, now seen corresponding path program 25 times [2023-01-27 22:35:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:35:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897312890] [2023-01-27 22:35:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:35:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:35:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:35:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:36,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:35:36,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897312890] [2023-01-27 22:35:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897312890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:35:36,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745121342] [2023-01-27 22:35:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:35:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:35:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:35:36,604 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:35:36,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 22:35:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:35:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:35:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:35:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:35:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745121342] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:35:37,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:35:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-01-27 22:35:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806171970] [2023-01-27 22:35:37,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:35:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 22:35:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:35:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 22:35:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-01-27 22:35:37,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:35:37,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2179 transitions, 73089 flow. Second operand has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:37,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:35:37,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:35:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:35:47,149 INFO L130 PetriNetUnfolder]: 7426/14580 cut-off events. [2023-01-27 22:35:47,149 INFO L131 PetriNetUnfolder]: For 646625/646625 co-relation queries the response was YES. [2023-01-27 22:35:47,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175183 conditions, 14580 events. 7426/14580 cut-off events. For 646625/646625 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 132510 event pairs, 104 based on Foata normal form. 66/14646 useless extension candidates. Maximal degree in co-relation 174260. Up to 4042 conditions per place. [2023-01-27 22:35:47,334 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 663 selfloop transitions, 2215 changer transitions 51/2929 dead transitions. [2023-01-27 22:35:47,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2929 transitions, 98252 flow [2023-01-27 22:35:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 22:35:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 22:35:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1969 transitions. [2023-01-27 22:35:47,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422713610991842 [2023-01-27 22:35:47,336 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1969 transitions. [2023-01-27 22:35:47,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1969 transitions. [2023-01-27 22:35:47,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:35:47,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1969 transitions. [2023-01-27 22:35:47,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.911764705882355) internal successors, (1969), 34 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:47,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:47,341 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:47,341 INFO L175 Difference]: Start difference. First operand has 552 places, 2179 transitions, 73089 flow. Second operand 34 states and 1969 transitions. [2023-01-27 22:35:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2929 transitions, 98252 flow [2023-01-27 22:35:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2929 transitions, 97725 flow, removed 227 selfloop flow, removed 10 redundant places. [2023-01-27 22:35:57,208 INFO L231 Difference]: Finished difference. Result has 583 places, 2543 transitions, 92010 flow [2023-01-27 22:35:57,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=72614, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=92010, PETRI_PLACES=583, PETRI_TRANSITIONS=2543} [2023-01-27 22:35:57,210 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 563 predicate places. [2023-01-27 22:35:57,210 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2543 transitions, 92010 flow [2023-01-27 22:35:57,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:57,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:35:57,210 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:35:57,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 22:35:57,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 22:35:57,415 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:35:57,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:35:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1412434121, now seen corresponding path program 26 times [2023-01-27 22:35:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:35:57,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480035481] [2023-01-27 22:35:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:35:57,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:35:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:35:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:57,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:35:57,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480035481] [2023-01-27 22:35:57,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480035481] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:35:57,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435059377] [2023-01-27 22:35:57,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:35:57,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:35:57,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:35:57,530 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:35:57,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 22:35:57,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:35:57,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:35:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 22:35:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:35:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:57,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:35:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:35:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435059377] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:35:57,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:35:57,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2023-01-27 22:35:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658399940] [2023-01-27 22:35:57,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:35:57,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:35:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:35:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:35:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:35:57,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-27 22:35:57,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2543 transitions, 92010 flow. Second operand has 15 states, 15 states have (on average 65.33333333333333) internal successors, (980), 15 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:35:57,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:35:57,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-27 22:35:57,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:36:13,387 INFO L130 PetriNetUnfolder]: 10420/20394 cut-off events. [2023-01-27 22:36:13,387 INFO L131 PetriNetUnfolder]: For 1021786/1021790 co-relation queries the response was YES. [2023-01-27 22:36:13,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258512 conditions, 20394 events. 10420/20394 cut-off events. For 1021786/1021790 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 194177 event pairs, 705 based on Foata normal form. 6/20393 useless extension candidates. Maximal degree in co-relation 257449. Up to 7919 conditions per place. [2023-01-27 22:36:13,777 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 1798 selfloop transitions, 1910 changer transitions 71/3792 dead transitions. [2023-01-27 22:36:13,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3792 transitions, 139482 flow [2023-01-27 22:36:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 22:36:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 22:36:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2023-01-27 22:36:13,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307612095933264 [2023-01-27 22:36:13,784 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2023-01-27 22:36:13,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2023-01-27 22:36:13,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:36:13,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2023-01-27 22:36:13,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:13,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:13,785 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:13,785 INFO L175 Difference]: Start difference. First operand has 583 places, 2543 transitions, 92010 flow. Second operand 7 states and 509 transitions. [2023-01-27 22:36:13,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3792 transitions, 139482 flow [2023-01-27 22:36:31,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3792 transitions, 136869 flow, removed 1218 selfloop flow, removed 13 redundant places. [2023-01-27 22:36:32,129 INFO L231 Difference]: Finished difference. Result has 581 places, 3366 transitions, 129443 flow [2023-01-27 22:36:32,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=90481, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=129443, PETRI_PLACES=581, PETRI_TRANSITIONS=3366} [2023-01-27 22:36:32,131 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-01-27 22:36:32,131 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3366 transitions, 129443 flow [2023-01-27 22:36:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.33333333333333) internal successors, (980), 15 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:32,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:36:32,132 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:36:32,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-27 22:36:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 22:36:32,336 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:36:32,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:36:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1079980299, now seen corresponding path program 27 times [2023-01-27 22:36:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:36:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102144285] [2023-01-27 22:36:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:36:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:36:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:36:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:36:32,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:36:32,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102144285] [2023-01-27 22:36:32,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102144285] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:36:32,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673723847] [2023-01-27 22:36:32,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:36:32,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:36:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:36:32,474 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:36:32,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 22:36:32,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:36:32,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:36:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:36:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:36:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:36:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:36:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:36:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673723847] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:36:32,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:36:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-01-27 22:36:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374310749] [2023-01-27 22:36:32,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:36:32,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:36:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:36:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:36:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-01-27 22:36:32,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:36:32,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3366 transitions, 129443 flow. Second operand has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:32,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:36:32,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:36:32,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:36:56,526 INFO L130 PetriNetUnfolder]: 11506/22564 cut-off events. [2023-01-27 22:36:56,527 INFO L131 PetriNetUnfolder]: For 1238342/1238342 co-relation queries the response was YES. [2023-01-27 22:36:56,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297807 conditions, 22564 events. 11506/22564 cut-off events. For 1238342/1238342 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 218432 event pairs, 7 based on Foata normal form. 172/22736 useless extension candidates. Maximal degree in co-relation 296654. Up to 5155 conditions per place. [2023-01-27 22:36:56,867 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 613 selfloop transitions, 3375 changer transitions 24/4012 dead transitions. [2023-01-27 22:36:56,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4012 transitions, 156394 flow [2023-01-27 22:36:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-27 22:36:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-27 22:36:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2704 transitions. [2023-01-27 22:36:56,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199409846249418 [2023-01-27 22:36:56,869 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2704 transitions. [2023-01-27 22:36:56,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2704 transitions. [2023-01-27 22:36:56,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:36:56,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2704 transitions. [2023-01-27 22:36:56,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.53191489361702) internal successors, (2704), 47 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:56,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:56,874 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:36:56,874 INFO L175 Difference]: Start difference. First operand has 581 places, 3366 transitions, 129443 flow. Second operand 47 states and 2704 transitions. [2023-01-27 22:36:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4012 transitions, 156394 flow [2023-01-27 22:37:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 4012 transitions, 155030 flow, removed 649 selfloop flow, removed 2 redundant places. [2023-01-27 22:37:22,518 INFO L231 Difference]: Finished difference. Result has 626 places, 3718 transitions, 148508 flow [2023-01-27 22:37:22,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=128441, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=148508, PETRI_PLACES=626, PETRI_TRANSITIONS=3718} [2023-01-27 22:37:22,520 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 606 predicate places. [2023-01-27 22:37:22,520 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 3718 transitions, 148508 flow [2023-01-27 22:37:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:37:22,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:37:22,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:37:22,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 22:37:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:37:22,721 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:37:22,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:37:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash -570063603, now seen corresponding path program 28 times [2023-01-27 22:37:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:37:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847690164] [2023-01-27 22:37:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:37:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:37:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:37:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:37:22,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:37:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847690164] [2023-01-27 22:37:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847690164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:37:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477804015] [2023-01-27 22:37:22,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:37:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:37:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:37:22,840 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:37:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 22:37:22,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:37:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:37:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 22:37:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:37:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:37:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:37:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:37:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477804015] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:37:23,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:37:23,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-01-27 22:37:23,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852967069] [2023-01-27 22:37:23,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:37:23,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 22:37:23,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:37:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 22:37:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-01-27 22:37:23,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:37:23,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 3718 transitions, 148508 flow. Second operand has 26 states, 26 states have (on average 53.88461538461539) internal successors, (1401), 26 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:37:23,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:37:23,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:37:23,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:37:51,797 INFO L130 PetriNetUnfolder]: 12790/25146 cut-off events. [2023-01-27 22:37:51,797 INFO L131 PetriNetUnfolder]: For 1462728/1462728 co-relation queries the response was YES. [2023-01-27 22:37:52,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339191 conditions, 25146 events. 12790/25146 cut-off events. For 1462728/1462728 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 247961 event pairs, 257 based on Foata normal form. 278/25424 useless extension candidates. Maximal degree in co-relation 337997. Up to 8557 conditions per place. [2023-01-27 22:37:52,212 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 1887 selfloop transitions, 2564 changer transitions 19/4470 dead transitions. [2023-01-27 22:37:52,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 4470 transitions, 179281 flow [2023-01-27 22:37:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-01-27 22:37:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-01-27 22:37:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3370 transitions. [2023-01-27 22:37:52,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169244092539899 [2023-01-27 22:37:52,215 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3370 transitions. [2023-01-27 22:37:52,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3370 transitions. [2023-01-27 22:37:52,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:37:52,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3370 transitions. [2023-01-27 22:37:52,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.11864406779661) internal successors, (3370), 59 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:37:52,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:37:52,222 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:37:52,222 INFO L175 Difference]: Start difference. First operand has 626 places, 3718 transitions, 148508 flow. Second operand 59 states and 3370 transitions. [2023-01-27 22:37:52,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 4470 transitions, 179281 flow [2023-01-27 22:38:21,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 4470 transitions, 177826 flow, removed 292 selfloop flow, removed 17 redundant places. [2023-01-27 22:38:22,016 INFO L231 Difference]: Finished difference. Result has 677 places, 4134 transitions, 170891 flow [2023-01-27 22:38:22,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=147113, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=170891, PETRI_PLACES=677, PETRI_TRANSITIONS=4134} [2023-01-27 22:38:22,019 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 657 predicate places. [2023-01-27 22:38:22,019 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4134 transitions, 170891 flow [2023-01-27 22:38:22,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.88461538461539) internal successors, (1401), 26 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:38:22,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:38:22,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:38:22,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 22:38:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:38:22,224 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:38:22,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:38:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2007987801, now seen corresponding path program 29 times [2023-01-27 22:38:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:38:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351818800] [2023-01-27 22:38:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:38:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:38:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:38:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:38:22,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:38:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351818800] [2023-01-27 22:38:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351818800] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:38:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393460768] [2023-01-27 22:38:22,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:38:22,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:38:22,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:38:22,337 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:38:22,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 22:38:22,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 22:38:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:38:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 22:38:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:38:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:38:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:38:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:38:22,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393460768] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:38:22,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:38:22,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-01-27 22:38:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701799554] [2023-01-27 22:38:22,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:38:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:38:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:38:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:38:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:38:22,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:38:22,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 4134 transitions, 170891 flow. Second operand has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:38:22,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:38:22,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:38:22,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:38:56,032 INFO L130 PetriNetUnfolder]: 13442/26547 cut-off events. [2023-01-27 22:38:56,032 INFO L131 PetriNetUnfolder]: For 1687724/1687724 co-relation queries the response was YES. [2023-01-27 22:38:56,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367912 conditions, 26547 events. 13442/26547 cut-off events. For 1687724/1687724 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 265533 event pairs, 167 based on Foata normal form. 198/26745 useless extension candidates. Maximal degree in co-relation 366717. Up to 6011 conditions per place. [2023-01-27 22:38:56,507 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1338 selfloop transitions, 3366 changer transitions 6/4710 dead transitions. [2023-01-27 22:38:56,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 4710 transitions, 194345 flow [2023-01-27 22:38:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-01-27 22:38:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-01-27 22:38:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4165 transitions. [2023-01-27 22:38:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41645835416458354 [2023-01-27 22:38:56,511 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4165 transitions. [2023-01-27 22:38:56,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4165 transitions. [2023-01-27 22:38:56,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:38:56,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4165 transitions. [2023-01-27 22:38:56,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.054794520547944) internal successors, (4165), 73 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:38:56,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:38:56,518 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:38:56,519 INFO L175 Difference]: Start difference. First operand has 677 places, 4134 transitions, 170891 flow. Second operand 73 states and 4165 transitions. [2023-01-27 22:38:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 4710 transitions, 194345 flow [2023-01-27 22:39:32,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 4710 transitions, 192161 flow, removed 387 selfloop flow, removed 41 redundant places. [2023-01-27 22:39:32,244 INFO L231 Difference]: Finished difference. Result has 712 places, 4362 transitions, 186521 flow [2023-01-27 22:39:32,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=168503, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=186521, PETRI_PLACES=712, PETRI_TRANSITIONS=4362} [2023-01-27 22:39:32,247 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-01-27 22:39:32,247 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 4362 transitions, 186521 flow [2023-01-27 22:39:32,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:39:32,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:39:32,247 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:39:32,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-27 22:39:32,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 22:39:32,452 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:39:32,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:39:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1247701379, now seen corresponding path program 30 times [2023-01-27 22:39:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:39:32,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590739688] [2023-01-27 22:39:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:39:32,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:39:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:39:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:39:32,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:39:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590739688] [2023-01-27 22:39:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590739688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:39:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667489060] [2023-01-27 22:39:32,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:39:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:39:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:39:32,568 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:39:32,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 22:39:32,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:39:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:39:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:39:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:39:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:39:32,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:39:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:39:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667489060] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:39:32,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:39:32,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-01-27 22:39:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856217651] [2023-01-27 22:39:32,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:39:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:39:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:39:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:39:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-01-27 22:39:32,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:39:32,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 4362 transitions, 186521 flow. Second operand has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:39:32,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:39:32,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:39:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:40:09,949 INFO L130 PetriNetUnfolder]: 14093/27798 cut-off events. [2023-01-27 22:40:09,949 INFO L131 PetriNetUnfolder]: For 1832570/1832570 co-relation queries the response was YES. [2023-01-27 22:40:10,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394317 conditions, 27798 events. 14093/27798 cut-off events. For 1832570/1832570 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 279662 event pairs, 199 based on Foata normal form. 126/27924 useless extension candidates. Maximal degree in co-relation 393110. Up to 8540 conditions per place. [2023-01-27 22:40:10,411 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 871 selfloop transitions, 3890 changer transitions 17/4778 dead transitions. [2023-01-27 22:40:10,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 4778 transitions, 208282 flow [2023-01-27 22:40:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 22:40:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 22:40:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2357 transitions. [2023-01-27 22:40:10,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196190137083853 [2023-01-27 22:40:10,414 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2357 transitions. [2023-01-27 22:40:10,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2357 transitions. [2023-01-27 22:40:10,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:40:10,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2357 transitions. [2023-01-27 22:40:10,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.48780487804878) internal successors, (2357), 41 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:40:10,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:40:10,418 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:40:10,418 INFO L175 Difference]: Start difference. First operand has 712 places, 4362 transitions, 186521 flow. Second operand 41 states and 2357 transitions. [2023-01-27 22:40:10,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 4778 transitions, 208282 flow [2023-01-27 22:40:52,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 4778 transitions, 206235 flow, removed 359 selfloop flow, removed 42 redundant places. [2023-01-27 22:40:53,082 INFO L231 Difference]: Finished difference. Result has 720 places, 4585 transitions, 205454 flow [2023-01-27 22:40:53,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=184563, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=205454, PETRI_PLACES=720, PETRI_TRANSITIONS=4585} [2023-01-27 22:40:53,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-01-27 22:40:53,085 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 4585 transitions, 205454 flow [2023-01-27 22:40:53,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:40:53,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:40:53,086 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:40:53,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 22:40:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:40:53,286 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:40:53,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:40:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -374253849, now seen corresponding path program 31 times [2023-01-27 22:40:53,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:40:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416792268] [2023-01-27 22:40:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:40:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:40:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:40:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:40:53,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:40:53,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416792268] [2023-01-27 22:40:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416792268] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:40:53,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523645245] [2023-01-27 22:40:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:40:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:40:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:40:53,402 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:40:53,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 22:40:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:40:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:40:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:40:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:40:53,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:40:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:40:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523645245] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:40:53,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:40:53,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-01-27 22:40:53,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184843267] [2023-01-27 22:40:53,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:40:53,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:40:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:40:53,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:40:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-01-27 22:40:53,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:40:53,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 4585 transitions, 205454 flow. Second operand has 27 states, 27 states have (on average 53.74074074074074) internal successors, (1451), 27 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:40:53,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:40:53,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:40:53,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:41:40,570 INFO L130 PetriNetUnfolder]: 15802/31241 cut-off events. [2023-01-27 22:41:40,570 INFO L131 PetriNetUnfolder]: For 2252934/2252934 co-relation queries the response was YES. [2023-01-27 22:41:40,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455355 conditions, 31241 events. 15802/31241 cut-off events. For 2252934/2252934 co-relation queries the response was YES. Maximal size of possible extension queue 2295. Compared 319383 event pairs, 238 based on Foata normal form. 104/31345 useless extension candidates. Maximal degree in co-relation 453557. Up to 6871 conditions per place. [2023-01-27 22:41:41,147 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 564 selfloop transitions, 4778 changer transitions 13/5355 dead transitions. [2023-01-27 22:41:41,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 5355 transitions, 241091 flow [2023-01-27 22:41:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-27 22:41:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-01-27 22:41:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3524 transitions. [2023-01-27 22:41:41,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148810925359077 [2023-01-27 22:41:41,150 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3524 transitions. [2023-01-27 22:41:41,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3524 transitions. [2023-01-27 22:41:41,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:41:41,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3524 transitions. [2023-01-27 22:41:41,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 56.83870967741935) internal successors, (3524), 62 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:41:41,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:41:41,156 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:41:41,156 INFO L175 Difference]: Start difference. First operand has 720 places, 4585 transitions, 205454 flow. Second operand 62 states and 3524 transitions. [2023-01-27 22:41:41,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 5355 transitions, 241091 flow [2023-01-27 22:42:32,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 5355 transitions, 240645 flow, removed 147 selfloop flow, removed 15 redundant places. [2023-01-27 22:42:32,441 INFO L231 Difference]: Finished difference. Result has 781 places, 5166 transitions, 243311 flow [2023-01-27 22:42:32,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=204975, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=243311, PETRI_PLACES=781, PETRI_TRANSITIONS=5166} [2023-01-27 22:42:32,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-01-27 22:42:32,444 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5166 transitions, 243311 flow [2023-01-27 22:42:32,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.74074074074074) internal successors, (1451), 27 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:42:32,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:42:32,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:42:32,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 22:42:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:42:32,649 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:42:32,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:42:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash 843710407, now seen corresponding path program 32 times [2023-01-27 22:42:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:42:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071421592] [2023-01-27 22:42:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:42:32,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:42:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:42:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:42:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:42:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071421592] [2023-01-27 22:42:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071421592] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:42:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899790102] [2023-01-27 22:42:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:42:32,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:42:32,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:42:32,750 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:42:32,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 22:42:32,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:42:32,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:42:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:42:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:42:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:42:32,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:42:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:42:33,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899790102] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:42:33,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:42:33,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-01-27 22:42:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075628739] [2023-01-27 22:42:33,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:42:33,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:42:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:42:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:42:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-01-27 22:42:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:42:33,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 5166 transitions, 243311 flow. Second operand has 27 states, 27 states have (on average 53.81481481481482) internal successors, (1453), 27 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:42:33,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:42:33,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:42:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:43:39,828 INFO L130 PetriNetUnfolder]: 17620/34603 cut-off events. [2023-01-27 22:43:39,829 INFO L131 PetriNetUnfolder]: For 2812587/2812587 co-relation queries the response was YES. [2023-01-27 22:43:40,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539688 conditions, 34603 events. 17620/34603 cut-off events. For 2812587/2812587 co-relation queries the response was YES. Maximal size of possible extension queue 2584. Compared 358028 event pairs, 237 based on Foata normal form. 684/35287 useless extension candidates. Maximal degree in co-relation 537878. Up to 11657 conditions per place. [2023-01-27 22:43:40,949 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1721 selfloop transitions, 4292 changer transitions 91/6104 dead transitions. [2023-01-27 22:43:40,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6104 transitions, 293304 flow [2023-01-27 22:43:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 22:43:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 22:43:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2528 transitions. [2023-01-27 22:43:40,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41937624419376246 [2023-01-27 22:43:40,951 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2528 transitions. [2023-01-27 22:43:40,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2528 transitions. [2023-01-27 22:43:40,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:43:40,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2528 transitions. [2023-01-27 22:43:40,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.45454545454545) internal successors, (2528), 44 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:43:40,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:43:40,956 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:43:40,956 INFO L175 Difference]: Start difference. First operand has 781 places, 5166 transitions, 243311 flow. Second operand 44 states and 2528 transitions. [2023-01-27 22:43:40,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6104 transitions, 293304 flow [2023-01-27 22:45:09,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 6104 transitions, 287470 flow, removed 1162 selfloop flow, removed 24 redundant places. [2023-01-27 22:45:09,276 INFO L231 Difference]: Finished difference. Result has 810 places, 5778 transitions, 280384 flow [2023-01-27 22:45:09,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=238068, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=280384, PETRI_PLACES=810, PETRI_TRANSITIONS=5778} [2023-01-27 22:45:09,280 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-01-27 22:45:09,280 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 5778 transitions, 280384 flow [2023-01-27 22:45:09,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.81481481481482) internal successors, (1453), 27 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:45:09,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:45:09,281 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:45:09,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 22:45:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-27 22:45:09,486 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:45:09,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:45:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1484966421, now seen corresponding path program 33 times [2023-01-27 22:45:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:45:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575028341] [2023-01-27 22:45:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:45:09,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:45:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:45:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:45:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:45:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575028341] [2023-01-27 22:45:09,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575028341] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:45:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574454785] [2023-01-27 22:45:09,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:45:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:45:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:45:09,633 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:45:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 22:45:09,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-27 22:45:09,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:45:09,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 22:45:09,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:45:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:45:09,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:45:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:45:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574454785] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:45:10,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:45:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-01-27 22:45:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018935450] [2023-01-27 22:45:10,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:45:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 22:45:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:45:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 22:45:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-01-27 22:45:10,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-27 22:45:10,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 5778 transitions, 280384 flow. Second operand has 29 states, 29 states have (on average 53.58620689655172) internal successors, (1554), 29 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:45:10,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:45:10,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-27 22:45:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:46:43,158 INFO L130 PetriNetUnfolder]: 20082/39656 cut-off events. [2023-01-27 22:46:43,159 INFO L131 PetriNetUnfolder]: For 3344915/3344915 co-relation queries the response was YES. [2023-01-27 22:46:44,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621852 conditions, 39656 events. 20082/39656 cut-off events. For 3344915/3344915 co-relation queries the response was YES. Maximal size of possible extension queue 2890. Compared 417405 event pairs, 295 based on Foata normal form. 344/40000 useless extension candidates. Maximal degree in co-relation 619398. Up to 10457 conditions per place. [2023-01-27 22:46:44,425 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 2245 selfloop transitions, 4597 changer transitions 36/6878 dead transitions. [2023-01-27 22:46:44,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 6878 transitions, 338387 flow [2023-01-27 22:46:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-27 22:46:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-27 22:46:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2583 transitions. [2023-01-27 22:46:44,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41897810218978104 [2023-01-27 22:46:44,429 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2583 transitions. [2023-01-27 22:46:44,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2583 transitions. [2023-01-27 22:46:44,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:46:44,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2583 transitions. [2023-01-27 22:46:44,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.4) internal successors, (2583), 45 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:46:44,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:46:44,434 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:46:44,434 INFO L175 Difference]: Start difference. First operand has 810 places, 5778 transitions, 280384 flow. Second operand 45 states and 2583 transitions. [2023-01-27 22:46:44,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 6878 transitions, 338387 flow Received shutdown request... [2023-01-27 22:47:56,217 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:47:56,217 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:47:56,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 22:47:56,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 22:47:56,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 22:47:56,670 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 22:47:56,672 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 22:47:56,672 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 22:47:56,672 INFO L445 BasicCegarLoop]: Path program histogram: [33, 2, 1] [2023-01-27 22:47:56,674 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:47:56,674 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:47:56,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:47:56 BasicIcfg [2023-01-27 22:47:56,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:47:56,676 INFO L158 Benchmark]: Toolchain (without parser) took 839228.67ms. Allocated memory was 352.3MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 321.5MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-01-27 22:47:56,676 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:47:56,676 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.12ms. Allocated memory is still 352.3MB. Free memory was 321.1MB in the beginning and 310.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 22:47:56,676 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.28ms. Allocated memory is still 352.3MB. Free memory was 310.6MB in the beginning and 308.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:47:56,676 INFO L158 Benchmark]: Boogie Preprocessor took 13.58ms. Allocated memory is still 352.3MB. Free memory was 308.9MB in the beginning and 307.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:47:56,676 INFO L158 Benchmark]: RCFGBuilder took 226.91ms. Allocated memory is still 352.3MB. Free memory was 307.8MB in the beginning and 293.4MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 22:47:56,677 INFO L158 Benchmark]: TraceAbstraction took 838809.20ms. Allocated memory was 352.3MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 293.1MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-01-27 22:47:56,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 157.12ms. Allocated memory is still 352.3MB. Free memory was 321.1MB in the beginning and 310.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.28ms. Allocated memory is still 352.3MB. Free memory was 310.6MB in the beginning and 308.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.58ms. Allocated memory is still 352.3MB. Free memory was 308.9MB in the beginning and 307.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 226.91ms. Allocated memory is still 352.3MB. Free memory was 307.8MB in the beginning and 293.4MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 838809.20ms. Allocated memory was 352.3MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 293.1MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 413 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 410, independent: 409, independent conditional: 0, independent unconditional: 409, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 212, independent: 211, independent conditional: 0, independent unconditional: 211, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 410, independent: 198, independent conditional: 0, independent unconditional: 198, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 212, unknown conditional: 0, unknown unconditional: 212] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 838.7s, OverallIterations: 36, TraceHistogramMax: 4, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 816.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5401 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5401 mSDsluCounter, 578 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 409 mSDsCounter, 929 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19474 IncrementalHoareTripleChecker+Invalid, 20403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 929 mSolverCounterUnsat, 169 mSDtfsCounter, 19474 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2785 GetRequests, 1321 SyntacticMatches, 62 SemanticMatches, 1402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21700 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=280384occurred in iteration=35, InterpolantAutomatonStates: 1003, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 1257 NumberOfCodeBlocks, 1247 NumberOfCodeBlocksAsserted, 116 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 9631 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4177 ConjunctsInSsa, 412 ConjunctsInUnsatCore, 103 InterpolantComputations, 4 PerfectInterpolantSequences, 288/1026 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown