/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/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:09:36,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:09:36,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:09:36,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:09:36,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:09:36,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:09:36,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:09:36,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:09:36,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:09:36,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:09:36,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:09:36,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:09:36,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:09:36,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:09:36,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:09:36,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:09:36,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:09:36,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:09:36,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:09:36,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:09:36,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:09:36,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:09:36,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:09:36,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:09:36,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:09:36,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:09:36,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:09:36,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:09:36,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:09:36,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:09:36,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:09:36,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:09:36,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:09:36,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:09:36,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:09:36,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:09:36,268 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 23:09:36,301 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:09:36,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:09:36,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:09:36,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:09:36,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:09:36,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:09:36,303 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:09:36,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:09:36,304 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:09:36,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:09:36,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:09:36,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:09:36,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:09:36,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:09:36,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:09:36,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:09:36,307 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:09:36,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:09:36,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:09:36,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:09:36,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:09:36,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:09:36,513 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:09:36,514 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:09:36,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-01-27 23:09:37,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:09:37,704 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:09:37,705 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-01-27 23:09:37,709 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f6cbce2/3bf1640f56a1411d802e2489cf4df534/FLAG000674668 [2023-01-27 23:09:37,720 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f6cbce2/3bf1640f56a1411d802e2489cf4df534 [2023-01-27 23:09:37,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:09:37,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:09:37,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:09:37,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:09:37,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:09:37,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:09:37" (1/1) ... [2023-01-27 23:09:37,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a00ba6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:37, skipping insertion in model container [2023-01-27 23:09:37,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:09:37" (1/1) ... [2023-01-27 23:09:37,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:09:37,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:09:37,943 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/unroll-2.wvr.c[2428,2441] [2023-01-27 23:09:37,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:09:37,968 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:09:38,004 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/unroll-2.wvr.c[2428,2441] [2023-01-27 23:09:38,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:09:38,021 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:09:38,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38 WrapperNode [2023-01-27 23:09:38,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:09:38,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:09:38,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:09:38,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:09:38,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,073 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2023-01-27 23:09:38,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:09:38,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:09:38,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:09:38,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:09:38,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:09:38,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:09:38,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:09:38,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:09:38,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (1/1) ... [2023-01-27 23:09:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:09:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:38,142 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 23:09:38,171 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 23:09:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:09:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 23:09:38,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 23:09:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 23:09:38,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 23:09:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:09:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:09:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:09:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 23:09:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:09:38,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:09:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:09:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:09:38,190 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 23:09:38,302 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:09:38,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:09:38,589 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:09:38,596 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:09:38,596 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 23:09:38,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:09:38 BoogieIcfgContainer [2023-01-27 23:09:38,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:09:38,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:09:38,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:09:38,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:09:38,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:09:37" (1/3) ... [2023-01-27 23:09:38,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd5bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:09:38, skipping insertion in model container [2023-01-27 23:09:38,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:38" (2/3) ... [2023-01-27 23:09:38,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd5bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:09:38, skipping insertion in model container [2023-01-27 23:09:38,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:09:38" (3/3) ... [2023-01-27 23:09:38,604 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-01-27 23:09:38,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:09:38,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:09:38,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:09:38,707 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:09:38,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 157 transitions, 330 flow [2023-01-27 23:09:38,819 INFO L130 PetriNetUnfolder]: 14/155 cut-off events. [2023-01-27 23:09:38,819 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:38,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 14/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:09:38,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 157 transitions, 330 flow [2023-01-27 23:09:38,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 147 transitions, 306 flow [2023-01-27 23:09:38,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:09:38,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 147 transitions, 306 flow [2023-01-27 23:09:38,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 147 transitions, 306 flow [2023-01-27 23:09:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 147 transitions, 306 flow [2023-01-27 23:09:38,874 INFO L130 PetriNetUnfolder]: 14/147 cut-off events. [2023-01-27 23:09:38,874 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 14/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:09:38,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 1942 [2023-01-27 23:09:43,128 INFO L134 LiptonReduction]: Checked pairs total: 1977 [2023-01-27 23:09:43,128 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-01-27 23:09:43,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:09:43,147 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;@6de7610f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:09:43,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:09:43,153 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 23:09:43,153 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:43,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:43,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:43,154 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 23:09:43,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1597977991, now seen corresponding path program 1 times [2023-01-27 23:09:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906356647] [2023-01-27 23:09:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:43,514 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 23:09:43,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:43,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906356647] [2023-01-27 23:09:43,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906356647] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:43,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:43,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:09:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637184545] [2023-01-27 23:09:43,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:43,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:09:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:09:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:09:43,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-01-27 23:09:43,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 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 23:09:43,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:43,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-01-27 23:09:43,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:43,600 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-01-27 23:09:43,600 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 23:09:43,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 178 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-27 23:09:43,602 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-27 23:09:43,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-27 23:09:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:09:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:09:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-01-27 23:09:43,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-01-27 23:09:43,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-01-27 23:09:43,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-01-27 23:09:43,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:43,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-01-27 23:09:43,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 23:09:43,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:09:43,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:09:43,631 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 407 transitions. [2023-01-27 23:09:43,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-27 23:09:43,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 23:09:43,636 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-27 23:09:43,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 23:09:43,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 23:09:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-27 23:09:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 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 23:09:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:43,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:09:43,642 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 23:09:43,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1173402768, now seen corresponding path program 1 times [2023-01-27 23:09:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:43,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257545795] [2023-01-27 23:09:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:43,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:43,884 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 23:09:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:43,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257545795] [2023-01-27 23:09:43,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257545795] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:43,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 23:09:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018604885] [2023-01-27 23:09:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:09:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:09:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:09:43,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-01-27 23:09:43,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 23:09:43,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:43,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-01-27 23:09:43,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:43,950 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-01-27 23:09:43,950 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-01-27 23:09:43,952 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-01-27 23:09:43,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-01-27 23:09:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:09:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:09:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-01-27 23:09:43,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171717171717172 [2023-01-27 23:09:43,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-01-27 23:09:43,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-01-27 23:09:43,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:43,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-01-27 23:09:43,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 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 23:09:43,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:09:43,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 23:09:43,965 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 413 transitions. [2023-01-27 23:09:43,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-01-27 23:09:43,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:43,966 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-01-27 23:09:43,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-01-27 23:09:43,967 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-27 23:09:43,967 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-01-27 23:09:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 23:09:43,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:43,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:43,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:09:43,969 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 23:09:43,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -592440007, now seen corresponding path program 1 times [2023-01-27 23:09:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210581055] [2023-01-27 23:09:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:44,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210581055] [2023-01-27 23:09:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210581055] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:44,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:44,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:09:44,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817480758] [2023-01-27 23:09:44,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:44,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:09:44,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:09:44,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 23:09:44,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:44,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:09:44,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:44,267 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-01-27 23:09:44,267 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-01-27 23:09:44,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 563 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-01-27 23:09:44,269 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-01-27 23:09:44,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-01-27 23:09:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:09:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:09:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-01-27 23:09:44,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2023-01-27 23:09:44,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-01-27 23:09:44,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-01-27 23:09:44,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:44,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-01-27 23:09:44,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 23:09:44,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 23:09:44,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 23:09:44,277 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 671 transitions. [2023-01-27 23:09:44,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-01-27 23:09:44,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:44,278 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-01-27 23:09:44,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-27 23:09:44,279 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-27 23:09:44,279 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-01-27 23:09:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 23:09:44,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:44,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:09:44,280 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 23:09:44,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1300877915, now seen corresponding path program 1 times [2023-01-27 23:09:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735247983] [2023-01-27 23:09:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:44,380 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 23:09:44,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735247983] [2023-01-27 23:09:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735247983] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243944151] [2023-01-27 23:09:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:44,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:44,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:44,389 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 23:09:44,414 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 23:09:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:44,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:44,600 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 23:09:44,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243944151] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:44,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 23:09:44,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-27 23:09:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660269437] [2023-01-27 23:09:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:44,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:09:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:09:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:09:44,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-01-27 23:09:44,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 23:09:44,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:44,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-01-27 23:09:44,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:44,731 INFO L130 PetriNetUnfolder]: 70/141 cut-off events. [2023-01-27 23:09:44,732 INFO L131 PetriNetUnfolder]: For 94/108 co-relation queries the response was YES. [2023-01-27 23:09:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 141 events. 70/141 cut-off events. For 94/108 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 425 event pairs, 15 based on Foata normal form. 20/158 useless extension candidates. Maximal degree in co-relation 413. Up to 88 conditions per place. [2023-01-27 23:09:44,739 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 28 selfloop transitions, 4 changer transitions 4/37 dead transitions. [2023-01-27 23:09:44,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 215 flow [2023-01-27 23:09:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:09:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:09:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-01-27 23:09:44,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-01-27 23:09:44,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-01-27 23:09:44,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-01-27 23:09:44,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:44,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-01-27 23:09:44,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 23:09:44,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 23:09:44,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 23:09:44,746 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 550 transitions. [2023-01-27 23:09:44,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 215 flow [2023-01-27 23:09:44,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 206 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:44,749 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 114 flow [2023-01-27 23:09:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-01-27 23:09:44,751 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-01-27 23:09:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 114 flow [2023-01-27 23:09:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 23:09:44,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:44,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:44,761 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 23:09:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:44,958 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 23:09:44,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1353157799, now seen corresponding path program 2 times [2023-01-27 23:09:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342788838] [2023-01-27 23:09:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342788838] [2023-01-27 23:09:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342788838] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:45,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:09:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438239266] [2023-01-27 23:09:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:09:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:09:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:09:45,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-01-27 23:09:45,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 23:09:45,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:45,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-01-27 23:09:45,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:45,128 INFO L130 PetriNetUnfolder]: 82/167 cut-off events. [2023-01-27 23:09:45,128 INFO L131 PetriNetUnfolder]: For 221/235 co-relation queries the response was YES. [2023-01-27 23:09:45,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 167 events. 82/167 cut-off events. For 221/235 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 571 event pairs, 29 based on Foata normal form. 18/182 useless extension candidates. Maximal degree in co-relation 530. Up to 108 conditions per place. [2023-01-27 23:09:45,129 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 31 selfloop transitions, 6 changer transitions 2/40 dead transitions. [2023-01-27 23:09:45,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 258 flow [2023-01-27 23:09:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:09:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:09:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-01-27 23:09:45,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2023-01-27 23:09:45,133 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-01-27 23:09:45,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-01-27 23:09:45,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:45,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-01-27 23:09:45,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 23:09:45,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 23:09:45,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 23:09:45,138 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 114 flow. Second operand 4 states and 546 transitions. [2023-01-27 23:09:45,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 258 flow [2023-01-27 23:09:45,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 251 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:45,140 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 147 flow [2023-01-27 23:09:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-01-27 23:09:45,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-01-27 23:09:45,141 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 147 flow [2023-01-27 23:09:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 23:09:45,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:45,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:45,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:09:45,142 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 23:09:45,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1429573215, now seen corresponding path program 2 times [2023-01-27 23:09:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:45,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656374757] [2023-01-27 23:09:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:45,317 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 23:09:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656374757] [2023-01-27 23:09:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656374757] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457936199] [2023-01-27 23:09:45,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:09:45,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:45,322 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 23:09:45,345 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 23:09:45,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:45,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:09:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457936199] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:45,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 23:09:45,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-01-27 23:09:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090862086] [2023-01-27 23:09:45,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:45,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:45,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-01-27 23:09:45,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:09:45,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 23:09:45,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:45,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:09:45,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:45,621 INFO L130 PetriNetUnfolder]: 99/191 cut-off events. [2023-01-27 23:09:45,621 INFO L131 PetriNetUnfolder]: For 388/388 co-relation queries the response was YES. [2023-01-27 23:09:45,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 191 events. 99/191 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 595 event pairs, 22 based on Foata normal form. 10/200 useless extension candidates. Maximal degree in co-relation 706. Up to 102 conditions per place. [2023-01-27 23:09:45,623 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 32 selfloop transitions, 9 changer transitions 8/49 dead transitions. [2023-01-27 23:09:45,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 336 flow [2023-01-27 23:09:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:09:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:09:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2023-01-27 23:09:45,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2023-01-27 23:09:45,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2023-01-27 23:09:45,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2023-01-27 23:09:45,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:45,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2023-01-27 23:09:45,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.83333333333334) internal successors, (803), 6 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 23:09:45,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 23:09:45,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 23:09:45,630 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 147 flow. Second operand 6 states and 803 transitions. [2023-01-27 23:09:45,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 336 flow [2023-01-27 23:09:45,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 315 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:45,635 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 173 flow [2023-01-27 23:09:45,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-01-27 23:09:45,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-01-27 23:09:45,635 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 173 flow [2023-01-27 23:09:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 23:09:45,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:45,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:45,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 23:09:45,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 23:09:45,842 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 23:09:45,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1027272943, now seen corresponding path program 3 times [2023-01-27 23:09:45,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:45,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264863732] [2023-01-27 23:09:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:45,951 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 23:09:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:45,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264863732] [2023-01-27 23:09:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264863732] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:45,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098370230] [2023-01-27 23:09:45,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:09:45,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:45,953 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 23:09:45,956 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 23:09:46,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:09:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:46,087 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 23:09:46,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:46,144 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 23:09:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098370230] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:46,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 23:09:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142445372] [2023-01-27 23:09:46,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 23:09:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 23:09:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-27 23:09:46,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:09:46,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 23:09:46,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:46,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:09:46,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:46,289 INFO L130 PetriNetUnfolder]: 111/206 cut-off events. [2023-01-27 23:09:46,289 INFO L131 PetriNetUnfolder]: For 593/593 co-relation queries the response was YES. [2023-01-27 23:09:46,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 206 events. 111/206 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 666 event pairs, 21 based on Foata normal form. 16/221 useless extension candidates. Maximal degree in co-relation 800. Up to 112 conditions per place. [2023-01-27 23:09:46,291 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 37 selfloop transitions, 13 changer transitions 6/56 dead transitions. [2023-01-27 23:09:46,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 448 flow [2023-01-27 23:09:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:09:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:09:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 802 transitions. [2023-01-27 23:09:46,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40505050505050505 [2023-01-27 23:09:46,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 802 transitions. [2023-01-27 23:09:46,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 802 transitions. [2023-01-27 23:09:46,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:46,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 802 transitions. [2023-01-27 23:09:46,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.66666666666666) internal successors, (802), 6 states have internal predecessors, (802), 0 states have call successors, (0), 0 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 23:09:46,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 23:09:46,300 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 23:09:46,300 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 173 flow. Second operand 6 states and 802 transitions. [2023-01-27 23:09:46,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 448 flow [2023-01-27 23:09:46,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 401 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-01-27 23:09:46,303 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 242 flow [2023-01-27 23:09:46,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-01-27 23:09:46,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-01-27 23:09:46,305 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 242 flow [2023-01-27 23:09:46,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 23:09:46,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:46,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:46,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 23:09:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:46,519 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 23:09:46,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:46,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1687337279, now seen corresponding path program 1 times [2023-01-27 23:09:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:46,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897487959] [2023-01-27 23:09:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:47,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:47,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897487959] [2023-01-27 23:09:47,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897487959] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698504892] [2023-01-27 23:09:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:47,304 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 23:09:47,307 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 23:09:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:47,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 23:09:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:47,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:09:47,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:09:47,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:09:47,726 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:09:47,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2023-01-27 23:09:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:47,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:48,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 106 [2023-01-27 23:09:48,077 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-27 23:09:48,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 571 [2023-01-27 23:09:48,175 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-01-27 23:09:48,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 133 [2023-01-27 23:09:48,374 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-01-27 23:09:48,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 136 [2023-01-27 23:09:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:48,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698504892] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:48,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:48,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-27 23:09:48,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546389127] [2023-01-27 23:09:48,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:48,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 23:09:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:48,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 23:09:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=345, Unknown=1, NotChecked=0, Total=462 [2023-01-27 23:09:48,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:09:48,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 242 flow. Second operand has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:09:48,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:48,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:09:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:49,390 INFO L130 PetriNetUnfolder]: 269/486 cut-off events. [2023-01-27 23:09:49,390 INFO L131 PetriNetUnfolder]: For 1420/1534 co-relation queries the response was YES. [2023-01-27 23:09:49,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 486 events. 269/486 cut-off events. For 1420/1534 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1932 event pairs, 40 based on Foata normal form. 80/555 useless extension candidates. Maximal degree in co-relation 1637. Up to 232 conditions per place. [2023-01-27 23:09:49,393 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 45 selfloop transitions, 23 changer transitions 51/124 dead transitions. [2023-01-27 23:09:49,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 124 transitions, 964 flow [2023-01-27 23:09:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 23:09:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 23:09:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1354 transitions. [2023-01-27 23:09:49,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3156177156177156 [2023-01-27 23:09:49,397 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1354 transitions. [2023-01-27 23:09:49,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1354 transitions. [2023-01-27 23:09:49,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:49,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1354 transitions. [2023-01-27 23:09:49,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 104.15384615384616) internal successors, (1354), 13 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 23:09:49,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 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 23:09:49,407 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 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 23:09:49,407 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 242 flow. Second operand 13 states and 1354 transitions. [2023-01-27 23:09:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 124 transitions, 964 flow [2023-01-27 23:09:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 124 transitions, 892 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:49,412 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 407 flow [2023-01-27 23:09:49,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=407, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-01-27 23:09:49,414 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-01-27 23:09:49,414 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 407 flow [2023-01-27 23:09:49,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:09:49,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:49,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:49,428 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 23:09:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:49,621 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 23:09:49,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1247683839, now seen corresponding path program 2 times [2023-01-27 23:09:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177794952] [2023-01-27 23:09:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177794952] [2023-01-27 23:09:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177794952] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582185883] [2023-01-27 23:09:50,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:09:50,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:50,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:50,503 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 23:09:50,505 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 23:09:50,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:50,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 23:09:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:50,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:09:50,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:09:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:09:50,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:09:50,866 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:09:50,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2023-01-27 23:09:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:50,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:51,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:51,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 103 [2023-01-27 23:09:51,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:51,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 912 treesize of output 852 [2023-01-27 23:09:51,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:51,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 232 [2023-01-27 23:09:51,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:51,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 129 [2023-01-27 23:09:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582185883] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:52,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:52,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-27 23:09:52,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653440918] [2023-01-27 23:09:52,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 23:09:52,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 23:09:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=375, Unknown=7, NotChecked=0, Total=462 [2023-01-27 23:09:52,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:09:52,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 407 flow. Second operand has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:09:52,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:09:52,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:52,983 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (and (not (= |c_ULTIMATE.start_main_~#t1~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (<= .cse0 |c_ULTIMATE.start_main_~#t1~0#1.base|) (forall ((v_ArrVal_216 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~f~0.base))) (let ((.cse2 (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)))) (or (= (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse1 (+ c_~f~0.offset (* .cse2 4)))) (< .cse2 0) (<= c_~size~0 .cse2))))) (= c_~x2~0 0) (= c_~x1~0 0) (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (<= c_~size~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|) (= c_~size~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (= |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 0))) is different from false [2023-01-27 23:09:53,337 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_216 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~f~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (= (select .cse0 .cse1) (select .cse0 (+ c_~f~0.offset (* .cse2 4)))) (< .cse2 0) (<= c_~size~0 .cse2))))) (let ((.cse5 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (< .cse4 0) (= (select .cse5 .cse1) (select .cse5 (+ (* .cse4 4) c_~f~0.offset))) (<= c_~size~0 .cse4)))))) is different from false [2023-01-27 23:09:53,673 INFO L130 PetriNetUnfolder]: 257/482 cut-off events. [2023-01-27 23:09:53,673 INFO L131 PetriNetUnfolder]: For 1798/1875 co-relation queries the response was YES. [2023-01-27 23:09:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 482 events. 257/482 cut-off events. For 1798/1875 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1892 event pairs, 22 based on Foata normal form. 62/532 useless extension candidates. Maximal degree in co-relation 2096. Up to 211 conditions per place. [2023-01-27 23:09:53,677 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 48 selfloop transitions, 45 changer transitions 23/121 dead transitions. [2023-01-27 23:09:53,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 121 transitions, 1082 flow [2023-01-27 23:09:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:09:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:09:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1640 transitions. [2023-01-27 23:09:53,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2023-01-27 23:09:53,682 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1640 transitions. [2023-01-27 23:09:53,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1640 transitions. [2023-01-27 23:09:53,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:53,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1640 transitions. [2023-01-27 23:09:53,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.5) internal successors, (1640), 16 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 23:09:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 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 23:09:53,692 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 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 23:09:53,692 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 407 flow. Second operand 16 states and 1640 transitions. [2023-01-27 23:09:53,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 121 transitions, 1082 flow [2023-01-27 23:09:53,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 1000 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-01-27 23:09:53,698 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 698 flow [2023-01-27 23:09:53,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=698, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-01-27 23:09:53,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-01-27 23:09:53,699 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 698 flow [2023-01-27 23:09:53,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:09:53,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:53,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:53,711 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 23:09:53,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:53,906 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 23:09:53,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1973804990, now seen corresponding path program 3 times [2023-01-27 23:09:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542698095] [2023-01-27 23:09:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:53,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:54,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:54,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542698095] [2023-01-27 23:09:54,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542698095] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:54,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38663746] [2023-01-27 23:09:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:09:54,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:54,783 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 23:09:54,785 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 23:09:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:09:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:09:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:55,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:09:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:09:55,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:55,156 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:09:55,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:09:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:09:55,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38663746] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:55,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 14 [2023-01-27 23:09:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240967242] [2023-01-27 23:09:55,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:55,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:09:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:09:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:09:55,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:09:55,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 698 flow. Second operand has 16 states, 16 states have (on average 99.4375) internal successors, (1591), 16 states have internal predecessors, (1591), 0 states have call successors, (0), 0 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 23:09:55,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:55,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:09:55,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:55,601 INFO L130 PetriNetUnfolder]: 314/576 cut-off events. [2023-01-27 23:09:55,602 INFO L131 PetriNetUnfolder]: For 2583/2672 co-relation queries the response was YES. [2023-01-27 23:09:55,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 576 events. 314/576 cut-off events. For 2583/2672 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2365 event pairs, 66 based on Foata normal form. 78/645 useless extension candidates. Maximal degree in co-relation 2742. Up to 376 conditions per place. [2023-01-27 23:09:55,607 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 80 selfloop transitions, 44 changer transitions 1/130 dead transitions. [2023-01-27 23:09:55,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 1310 flow [2023-01-27 23:09:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 23:09:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 23:09:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1441 transitions. [2023-01-27 23:09:55,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119047619047619 [2023-01-27 23:09:55,611 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1441 transitions. [2023-01-27 23:09:55,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1441 transitions. [2023-01-27 23:09:55,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:55,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1441 transitions. [2023-01-27 23:09:55,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.92857142857143) internal successors, (1441), 14 states have internal predecessors, (1441), 0 states have call successors, (0), 0 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 23:09:55,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 23:09:55,620 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 23:09:55,620 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 698 flow. Second operand 14 states and 1441 transitions. [2023-01-27 23:09:55,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 1310 flow [2023-01-27 23:09:55,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 130 transitions, 1163 flow, removed 60 selfloop flow, removed 9 redundant places. [2023-01-27 23:09:55,628 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 903 flow [2023-01-27 23:09:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=903, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2023-01-27 23:09:55,629 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-01-27 23:09:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 903 flow [2023-01-27 23:09:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.4375) internal successors, (1591), 16 states have internal predecessors, (1591), 0 states have call successors, (0), 0 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 23:09:55,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:55,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:55,639 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 23:09:55,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:55,836 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 23:09:55,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash -293986682, now seen corresponding path program 4 times [2023-01-27 23:09:55,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:55,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227206100] [2023-01-27 23:09:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:56,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:56,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227206100] [2023-01-27 23:09:56,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227206100] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:56,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333082654] [2023-01-27 23:09:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:09:56,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:56,849 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 23:09:56,851 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 23:09:56,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:09:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 23:09:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:57,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:57,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:09:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:57,119 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:09:57,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:09:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:09:57,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333082654] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:57,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:57,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-01-27 23:09:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304825818] [2023-01-27 23:09:57,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:09:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:09:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:09:57,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:09:57,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 903 flow. Second operand has 17 states, 17 states have (on average 99.3529411764706) internal successors, (1689), 17 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 23:09:57,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:57,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:09:57,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:57,647 INFO L130 PetriNetUnfolder]: 402/735 cut-off events. [2023-01-27 23:09:57,647 INFO L131 PetriNetUnfolder]: For 2883/2965 co-relation queries the response was YES. [2023-01-27 23:09:57,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 735 events. 402/735 cut-off events. For 2883/2965 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3285 event pairs, 89 based on Foata normal form. 63/789 useless extension candidates. Maximal degree in co-relation 3175. Up to 561 conditions per place. [2023-01-27 23:09:57,653 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 99 selfloop transitions, 37 changer transitions 1/142 dead transitions. [2023-01-27 23:09:57,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 142 transitions, 1488 flow [2023-01-27 23:09:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 23:09:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 23:09:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1431 transitions. [2023-01-27 23:09:57,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30974025974025976 [2023-01-27 23:09:57,658 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1431 transitions. [2023-01-27 23:09:57,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1431 transitions. [2023-01-27 23:09:57,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:57,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1431 transitions. [2023-01-27 23:09:57,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.21428571428571) internal successors, (1431), 14 states have internal predecessors, (1431), 0 states have call successors, (0), 0 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 23:09:57,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 23:09:57,667 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 23:09:57,667 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 903 flow. Second operand 14 states and 1431 transitions. [2023-01-27 23:09:57,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 142 transitions, 1488 flow [2023-01-27 23:09:57,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1404 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-01-27 23:09:57,677 INFO L231 Difference]: Finished difference. Result has 84 places, 108 transitions, 1102 flow [2023-01-27 23:09:57,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1102, PETRI_PLACES=84, PETRI_TRANSITIONS=108} [2023-01-27 23:09:57,678 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-01-27 23:09:57,678 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 108 transitions, 1102 flow [2023-01-27 23:09:57,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.3529411764706) internal successors, (1689), 17 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 23:09:57,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:57,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:57,700 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 23:09:57,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:57,901 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 23:09:57,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash -720202900, now seen corresponding path program 5 times [2023-01-27 23:09:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:57,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188539552] [2023-01-27 23:09:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:57,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188539552] [2023-01-27 23:09:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188539552] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913382533] [2023-01-27 23:09:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:09:58,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:58,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:58,713 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 23:09:58,736 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 23:09:58,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:09:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:09:59,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 23:09:59,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:09:59,063 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-01-27 23:09:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2023-01-27 23:09:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:59,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:59,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:59,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-01-27 23:09:59,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:09:59,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-01-27 23:09:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:09:59,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913382533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:59,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-01-27 23:09:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041446103] [2023-01-27 23:09:59,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:09:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:09:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=357, Unknown=2, NotChecked=0, Total=420 [2023-01-27 23:09:59,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:09:59,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 108 transitions, 1102 flow. Second operand has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 23:09:59,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:59,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:09:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:00,120 INFO L130 PetriNetUnfolder]: 554/1015 cut-off events. [2023-01-27 23:10:00,121 INFO L131 PetriNetUnfolder]: For 3670/3783 co-relation queries the response was YES. [2023-01-27 23:10:00,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 1015 events. 554/1015 cut-off events. For 3670/3783 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4877 event pairs, 85 based on Foata normal form. 107/1113 useless extension candidates. Maximal degree in co-relation 4398. Up to 645 conditions per place. [2023-01-27 23:10:00,128 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 112 selfloop transitions, 59 changer transitions 2/178 dead transitions. [2023-01-27 23:10:00,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1882 flow [2023-01-27 23:10:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 23:10:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 23:10:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1547 transitions. [2023-01-27 23:10:00,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31252525252525254 [2023-01-27 23:10:00,133 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1547 transitions. [2023-01-27 23:10:00,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1547 transitions. [2023-01-27 23:10:00,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:00,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1547 transitions. [2023-01-27 23:10:00,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 103.13333333333334) internal successors, (1547), 15 states have internal predecessors, (1547), 0 states have call successors, (0), 0 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 23:10:00,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 23:10:00,143 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 23:10:00,143 INFO L175 Difference]: Start difference. First operand has 84 places, 108 transitions, 1102 flow. Second operand 15 states and 1547 transitions. [2023-01-27 23:10:00,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1882 flow [2023-01-27 23:10:00,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1769 flow, removed 45 selfloop flow, removed 5 redundant places. [2023-01-27 23:10:00,155 INFO L231 Difference]: Finished difference. Result has 98 places, 132 transitions, 1442 flow [2023-01-27 23:10:00,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1442, PETRI_PLACES=98, PETRI_TRANSITIONS=132} [2023-01-27 23:10:00,155 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-01-27 23:10:00,155 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 132 transitions, 1442 flow [2023-01-27 23:10:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 23:10:00,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:00,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:00,168 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 23:10:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 23:10:00,362 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 23:10:00,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1967274485, now seen corresponding path program 6 times [2023-01-27 23:10:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468149054] [2023-01-27 23:10:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:00,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:00,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468149054] [2023-01-27 23:10:00,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468149054] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:00,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120270396] [2023-01-27 23:10:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:10:00,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:00,637 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 23:10:00,640 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 23:10:00,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:10:00,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:00,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:00,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120270396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:00,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:00,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-01-27 23:10:00,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41633073] [2023-01-27 23:10:00,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:00,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:10:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:00,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 132 transitions, 1442 flow. Second operand has 17 states, 17 states have (on average 128.23529411764707) internal successors, (2180), 17 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 23:10:00,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:00,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:00,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:04,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 23:10:04,694 INFO L130 PetriNetUnfolder]: 944/1748 cut-off events. [2023-01-27 23:10:04,694 INFO L131 PetriNetUnfolder]: For 7392/7392 co-relation queries the response was YES. [2023-01-27 23:10:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8130 conditions, 1748 events. 944/1748 cut-off events. For 7392/7392 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9839 event pairs, 97 based on Foata normal form. 24/1771 useless extension candidates. Maximal degree in co-relation 7499. Up to 617 conditions per place. [2023-01-27 23:10:04,707 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 177 selfloop transitions, 155 changer transitions 13/345 dead transitions. [2023-01-27 23:10:04,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 345 transitions, 4040 flow [2023-01-27 23:10:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 23:10:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 23:10:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3288 transitions. [2023-01-27 23:10:04,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854545454545454 [2023-01-27 23:10:04,714 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3288 transitions. [2023-01-27 23:10:04,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3288 transitions. [2023-01-27 23:10:04,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:04,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3288 transitions. [2023-01-27 23:10:04,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 131.52) internal successors, (3288), 25 states have internal predecessors, (3288), 0 states have call successors, (0), 0 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 23:10:04,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 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 23:10:04,730 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 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 23:10:04,731 INFO L175 Difference]: Start difference. First operand has 98 places, 132 transitions, 1442 flow. Second operand 25 states and 3288 transitions. [2023-01-27 23:10:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 345 transitions, 4040 flow [2023-01-27 23:10:04,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 345 transitions, 3799 flow, removed 109 selfloop flow, removed 5 redundant places. [2023-01-27 23:10:04,753 INFO L231 Difference]: Finished difference. Result has 127 places, 252 transitions, 3181 flow [2023-01-27 23:10:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3181, PETRI_PLACES=127, PETRI_TRANSITIONS=252} [2023-01-27 23:10:04,754 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2023-01-27 23:10:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 252 transitions, 3181 flow [2023-01-27 23:10:04,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.23529411764707) internal successors, (2180), 17 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 23:10:04,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:04,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:04,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 23:10:04,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 23:10:04,960 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 23:10:04,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash -576327455, now seen corresponding path program 7 times [2023-01-27 23:10:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:04,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310426634] [2023-01-27 23:10:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:05,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:05,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310426634] [2023-01-27 23:10:05,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310426634] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:05,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472723047] [2023-01-27 23:10:05,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:10:05,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:05,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:05,135 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 23:10:05,138 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 23:10:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472723047] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:05,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-01-27 23:10:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938522645] [2023-01-27 23:10:05,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:10:05,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:10:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:10:05,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:05,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 252 transitions, 3181 flow. Second operand has 14 states, 14 states have (on average 128.14285714285714) internal successors, (1794), 14 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 23:10:05,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:05,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:05,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:06,183 INFO L130 PetriNetUnfolder]: 1061/2049 cut-off events. [2023-01-27 23:10:06,184 INFO L131 PetriNetUnfolder]: For 13255/13255 co-relation queries the response was YES. [2023-01-27 23:10:06,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11233 conditions, 2049 events. 1061/2049 cut-off events. For 13255/13255 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12560 event pairs, 76 based on Foata normal form. 36/2084 useless extension candidates. Maximal degree in co-relation 10683. Up to 721 conditions per place. [2023-01-27 23:10:06,200 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 211 selfloop transitions, 163 changer transitions 22/396 dead transitions. [2023-01-27 23:10:06,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 396 transitions, 5176 flow [2023-01-27 23:10:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 23:10:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 23:10:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2770 transitions. [2023-01-27 23:10:06,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997113997113997 [2023-01-27 23:10:06,204 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2770 transitions. [2023-01-27 23:10:06,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2770 transitions. [2023-01-27 23:10:06,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:06,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2770 transitions. [2023-01-27 23:10:06,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.9047619047619) internal successors, (2770), 21 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 23:10:06,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 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 23:10:06,215 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 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 23:10:06,215 INFO L175 Difference]: Start difference. First operand has 127 places, 252 transitions, 3181 flow. Second operand 21 states and 2770 transitions. [2023-01-27 23:10:06,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 396 transitions, 5176 flow [2023-01-27 23:10:06,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 396 transitions, 4764 flow, removed 182 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:06,278 INFO L231 Difference]: Finished difference. Result has 154 places, 293 transitions, 3844 flow [2023-01-27 23:10:06,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3844, PETRI_PLACES=154, PETRI_TRANSITIONS=293} [2023-01-27 23:10:06,279 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-01-27 23:10:06,279 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 293 transitions, 3844 flow [2023-01-27 23:10:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.14285714285714) internal successors, (1794), 14 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 23:10:06,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:06,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:06,288 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 23:10:06,484 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,SelfDestructingSolverStorable13 [2023-01-27 23:10:06,485 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 23:10:06,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -282767609, now seen corresponding path program 8 times [2023-01-27 23:10:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:06,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149756948] [2023-01-27 23:10:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:06,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:06,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:06,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149756948] [2023-01-27 23:10:06,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149756948] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:06,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454537396] [2023-01-27 23:10:06,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:10:06,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:06,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:06,743 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 23:10:06,770 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 23:10:06,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:06,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:07,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454537396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:07,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-27 23:10:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409212100] [2023-01-27 23:10:07,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:10:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:10:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:10:07,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:07,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 293 transitions, 3844 flow. Second operand has 19 states, 19 states have (on average 127.78947368421052) internal successors, (2428), 19 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 23:10:07,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:07,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:07,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:08,259 INFO L130 PetriNetUnfolder]: 942/1813 cut-off events. [2023-01-27 23:10:08,259 INFO L131 PetriNetUnfolder]: For 15351/15351 co-relation queries the response was YES. [2023-01-27 23:10:08,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11152 conditions, 1813 events. 942/1813 cut-off events. For 15351/15351 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10705 event pairs, 174 based on Foata normal form. 118/1930 useless extension candidates. Maximal degree in co-relation 10891. Up to 732 conditions per place. [2023-01-27 23:10:08,277 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 158 selfloop transitions, 240 changer transitions 8/406 dead transitions. [2023-01-27 23:10:08,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 406 transitions, 5842 flow [2023-01-27 23:10:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:10:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:10:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2908 transitions. [2023-01-27 23:10:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40055096418732783 [2023-01-27 23:10:08,281 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2908 transitions. [2023-01-27 23:10:08,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2908 transitions. [2023-01-27 23:10:08,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:08,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2908 transitions. [2023-01-27 23:10:08,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.1818181818182) internal successors, (2908), 22 states have internal predecessors, (2908), 0 states have call successors, (0), 0 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 23:10:08,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 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 23:10:08,292 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 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 23:10:08,292 INFO L175 Difference]: Start difference. First operand has 154 places, 293 transitions, 3844 flow. Second operand 22 states and 2908 transitions. [2023-01-27 23:10:08,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 406 transitions, 5842 flow [2023-01-27 23:10:08,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 406 transitions, 5071 flow, removed 328 selfloop flow, removed 11 redundant places. [2023-01-27 23:10:08,387 INFO L231 Difference]: Finished difference. Result has 163 places, 337 transitions, 4651 flow [2023-01-27 23:10:08,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4651, PETRI_PLACES=163, PETRI_TRANSITIONS=337} [2023-01-27 23:10:08,388 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-01-27 23:10:08,388 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 337 transitions, 4651 flow [2023-01-27 23:10:08,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 127.78947368421052) internal successors, (2428), 19 states have internal predecessors, (2428), 0 states have call successors, (0), 0 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 23:10:08,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:08,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:08,397 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 23:10:08,597 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,SelfDestructingSolverStorable14 [2023-01-27 23:10:08,597 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 23:10:08,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1636053091, now seen corresponding path program 9 times [2023-01-27 23:10:08,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:08,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933187312] [2023-01-27 23:10:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:08,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:08,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933187312] [2023-01-27 23:10:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933187312] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840522528] [2023-01-27 23:10:08,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:10:08,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:08,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:08,834 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 23:10:08,837 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 23:10:08,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:10:08,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:09,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840522528] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:09,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:09,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:10:09,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157346619] [2023-01-27 23:10:09,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:10:09,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:09,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 337 transitions, 4651 flow. Second operand has 18 states, 18 states have (on average 127.88888888888889) internal successors, (2302), 18 states have internal predecessors, (2302), 0 states have call successors, (0), 0 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 23:10:09,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:09,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:09,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:10,449 INFO L130 PetriNetUnfolder]: 916/1865 cut-off events. [2023-01-27 23:10:10,449 INFO L131 PetriNetUnfolder]: For 10626/10626 co-relation queries the response was YES. [2023-01-27 23:10:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10840 conditions, 1865 events. 916/1865 cut-off events. For 10626/10626 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11701 event pairs, 81 based on Foata normal form. 36/1900 useless extension candidates. Maximal degree in co-relation 10356. Up to 479 conditions per place. [2023-01-27 23:10:10,464 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 163 selfloop transitions, 247 changer transitions 14/424 dead transitions. [2023-01-27 23:10:10,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 424 transitions, 5967 flow [2023-01-27 23:10:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 23:10:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 23:10:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3927 transitions. [2023-01-27 23:10:10,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2023-01-27 23:10:10,470 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3927 transitions. [2023-01-27 23:10:10,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3927 transitions. [2023-01-27 23:10:10,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:10,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3927 transitions. [2023-01-27 23:10:10,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 130.9) internal successors, (3927), 30 states have internal predecessors, (3927), 0 states have call successors, (0), 0 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 23:10:10,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 330.0) internal successors, (10230), 31 states have internal predecessors, (10230), 0 states have call successors, (0), 0 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 23:10:10,482 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 330.0) internal successors, (10230), 31 states have internal predecessors, (10230), 0 states have call successors, (0), 0 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 23:10:10,482 INFO L175 Difference]: Start difference. First operand has 163 places, 337 transitions, 4651 flow. Second operand 30 states and 3927 transitions. [2023-01-27 23:10:10,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 424 transitions, 5967 flow [2023-01-27 23:10:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 424 transitions, 5641 flow, removed 127 selfloop flow, removed 4 redundant places. [2023-01-27 23:10:10,541 INFO L231 Difference]: Finished difference. Result has 191 places, 342 transitions, 4933 flow [2023-01-27 23:10:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4933, PETRI_PLACES=191, PETRI_TRANSITIONS=342} [2023-01-27 23:10:10,542 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-01-27 23:10:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 342 transitions, 4933 flow [2023-01-27 23:10:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.88888888888889) internal successors, (2302), 18 states have internal predecessors, (2302), 0 states have call successors, (0), 0 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 23:10:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:10,548 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 23:10:10,746 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,SelfDestructingSolverStorable15 [2023-01-27 23:10:10,747 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 23:10:10,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1487088225, now seen corresponding path program 10 times [2023-01-27 23:10:10,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287562685] [2023-01-27 23:10:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287562685] [2023-01-27 23:10:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287562685] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:10,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764965389] [2023-01-27 23:10:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:10:10,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:10,916 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 23:10:10,918 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 23:10:11,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:10:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:11,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:11,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:11,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764965389] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:11,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:11,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:10:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738894641] [2023-01-27 23:10:11,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:10:11,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:11,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 342 transitions, 4933 flow. Second operand has 17 states, 17 states have (on average 127.76470588235294) internal successors, (2172), 17 states have internal predecessors, (2172), 0 states have call successors, (0), 0 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 23:10:11,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:11,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:11,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:12,853 INFO L130 PetriNetUnfolder]: 1019/2043 cut-off events. [2023-01-27 23:10:12,853 INFO L131 PetriNetUnfolder]: For 13464/13464 co-relation queries the response was YES. [2023-01-27 23:10:12,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2043 events. 1019/2043 cut-off events. For 13464/13464 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12916 event pairs, 245 based on Foata normal form. 20/2062 useless extension candidates. Maximal degree in co-relation 12383. Up to 1114 conditions per place. [2023-01-27 23:10:12,874 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 265 selfloop transitions, 213 changer transitions 3/481 dead transitions. [2023-01-27 23:10:12,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 481 transitions, 7383 flow [2023-01-27 23:10:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:10:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:10:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3805 transitions. [2023-01-27 23:10:12,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39759665621734586 [2023-01-27 23:10:12,879 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3805 transitions. [2023-01-27 23:10:12,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3805 transitions. [2023-01-27 23:10:12,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:12,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3805 transitions. [2023-01-27 23:10:12,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 131.20689655172413) internal successors, (3805), 29 states have internal predecessors, (3805), 0 states have call successors, (0), 0 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 23:10:12,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:10:12,890 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:10:12,890 INFO L175 Difference]: Start difference. First operand has 191 places, 342 transitions, 4933 flow. Second operand 29 states and 3805 transitions. [2023-01-27 23:10:12,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 481 transitions, 7383 flow [2023-01-27 23:10:12,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 481 transitions, 6912 flow, removed 71 selfloop flow, removed 13 redundant places. [2023-01-27 23:10:12,975 INFO L231 Difference]: Finished difference. Result has 217 places, 404 transitions, 6132 flow [2023-01-27 23:10:12,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6132, PETRI_PLACES=217, PETRI_TRANSITIONS=404} [2023-01-27 23:10:12,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-01-27 23:10:12,976 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 404 transitions, 6132 flow [2023-01-27 23:10:12,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.76470588235294) internal successors, (2172), 17 states have internal predecessors, (2172), 0 states have call successors, (0), 0 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 23:10:12,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:12,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:12,982 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 23:10:13,182 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,SelfDestructingSolverStorable16 [2023-01-27 23:10:13,182 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 23:10:13,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2070152813, now seen corresponding path program 11 times [2023-01-27 23:10:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511055186] [2023-01-27 23:10:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:13,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511055186] [2023-01-27 23:10:13,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511055186] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:13,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159997278] [2023-01-27 23:10:13,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:10:13,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:13,416 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 23:10:13,419 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 23:10:13,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:10:13,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:13,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159997278] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:13,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:10:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745136598] [2023-01-27 23:10:13,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:13,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:10:13,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:13,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 404 transitions, 6132 flow. Second operand has 18 states, 18 states have (on average 127.72222222222223) internal successors, (2299), 18 states have internal predecessors, (2299), 0 states have call successors, (0), 0 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 23:10:13,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:13,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:15,316 INFO L130 PetriNetUnfolder]: 1133/2279 cut-off events. [2023-01-27 23:10:15,316 INFO L131 PetriNetUnfolder]: For 17769/17769 co-relation queries the response was YES. [2023-01-27 23:10:15,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15257 conditions, 2279 events. 1133/2279 cut-off events. For 17769/17769 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14803 event pairs, 219 based on Foata normal form. 12/2290 useless extension candidates. Maximal degree in co-relation 14715. Up to 990 conditions per place. [2023-01-27 23:10:15,334 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 248 selfloop transitions, 282 changer transitions 3/533 dead transitions. [2023-01-27 23:10:15,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 533 transitions, 8530 flow [2023-01-27 23:10:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:10:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:10:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3175 transitions. [2023-01-27 23:10:15,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008838383838384 [2023-01-27 23:10:15,338 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3175 transitions. [2023-01-27 23:10:15,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3175 transitions. [2023-01-27 23:10:15,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:15,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3175 transitions. [2023-01-27 23:10:15,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.29166666666666) internal successors, (3175), 24 states have internal predecessors, (3175), 0 states have call successors, (0), 0 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 23:10:15,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:10:15,348 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:10:15,348 INFO L175 Difference]: Start difference. First operand has 217 places, 404 transitions, 6132 flow. Second operand 24 states and 3175 transitions. [2023-01-27 23:10:15,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 533 transitions, 8530 flow [2023-01-27 23:10:15,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 533 transitions, 8135 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-01-27 23:10:15,481 INFO L231 Difference]: Finished difference. Result has 234 places, 444 transitions, 7210 flow [2023-01-27 23:10:15,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7210, PETRI_PLACES=234, PETRI_TRANSITIONS=444} [2023-01-27 23:10:15,482 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-01-27 23:10:15,482 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 444 transitions, 7210 flow [2023-01-27 23:10:15,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.72222222222223) internal successors, (2299), 18 states have internal predecessors, (2299), 0 states have call successors, (0), 0 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 23:10:15,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:15,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:15,489 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 23:10:15,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:15,688 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 23:10:15,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash -405140153, now seen corresponding path program 12 times [2023-01-27 23:10:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903800616] [2023-01-27 23:10:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:15,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:15,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903800616] [2023-01-27 23:10:15,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903800616] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:15,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26494783] [2023-01-27 23:10:15,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:10:15,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:15,897 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 23:10:15,922 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 23:10:16,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:10:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:16,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:16,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:16,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26494783] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:16,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:16,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-27 23:10:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228515441] [2023-01-27 23:10:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:16,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:10:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:10:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:10:16,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:16,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 444 transitions, 7210 flow. Second operand has 16 states, 16 states have (on average 127.9375) internal successors, (2047), 16 states have internal predecessors, (2047), 0 states have call successors, (0), 0 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 23:10:16,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:16,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:18,340 INFO L130 PetriNetUnfolder]: 1085/2209 cut-off events. [2023-01-27 23:10:18,340 INFO L131 PetriNetUnfolder]: For 19775/19775 co-relation queries the response was YES. [2023-01-27 23:10:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15322 conditions, 2209 events. 1085/2209 cut-off events. For 19775/19775 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14368 event pairs, 97 based on Foata normal form. 44/2252 useless extension candidates. Maximal degree in co-relation 14774. Up to 527 conditions per place. [2023-01-27 23:10:18,361 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 256 selfloop transitions, 293 changer transitions 5/554 dead transitions. [2023-01-27 23:10:18,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 554 transitions, 8931 flow [2023-01-27 23:10:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 23:10:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 23:10:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5751 transitions. [2023-01-27 23:10:18,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39607438016528923 [2023-01-27 23:10:18,370 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5751 transitions. [2023-01-27 23:10:18,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5751 transitions. [2023-01-27 23:10:18,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:18,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5751 transitions. [2023-01-27 23:10:18,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 130.70454545454547) internal successors, (5751), 44 states have internal predecessors, (5751), 0 states have call successors, (0), 0 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 23:10:18,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 330.0) internal successors, (14850), 45 states have internal predecessors, (14850), 0 states have call successors, (0), 0 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 23:10:18,390 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 330.0) internal successors, (14850), 45 states have internal predecessors, (14850), 0 states have call successors, (0), 0 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 23:10:18,390 INFO L175 Difference]: Start difference. First operand has 234 places, 444 transitions, 7210 flow. Second operand 44 states and 5751 transitions. [2023-01-27 23:10:18,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 554 transitions, 8931 flow [2023-01-27 23:10:18,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 554 transitions, 8567 flow, removed 82 selfloop flow, removed 11 redundant places. [2023-01-27 23:10:18,560 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 7428 flow [2023-01-27 23:10:18,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7428, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2023-01-27 23:10:18,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-01-27 23:10:18,561 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 7428 flow [2023-01-27 23:10:18,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.9375) internal successors, (2047), 16 states have internal predecessors, (2047), 0 states have call successors, (0), 0 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 23:10:18,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:18,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:18,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 23:10:18,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:18,768 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 23:10:18,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1666404129, now seen corresponding path program 13 times [2023-01-27 23:10:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:18,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337346802] [2023-01-27 23:10:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:18,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337346802] [2023-01-27 23:10:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337346802] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341397155] [2023-01-27 23:10:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:10:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:18,949 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 23:10:18,975 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 23:10:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341397155] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:19,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:10:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225877808] [2023-01-27 23:10:19,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:10:19,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:19,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 7428 flow. Second operand has 17 states, 17 states have (on average 127.94117647058823) internal successors, (2175), 17 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:10:19,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:19,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:19,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:24,877 INFO L130 PetriNetUnfolder]: 1728/3559 cut-off events. [2023-01-27 23:10:24,878 INFO L131 PetriNetUnfolder]: For 33727/33727 co-relation queries the response was YES. [2023-01-27 23:10:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26406 conditions, 3559 events. 1728/3559 cut-off events. For 33727/33727 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26091 event pairs, 160 based on Foata normal form. 58/3616 useless extension candidates. Maximal degree in co-relation 25898. Up to 871 conditions per place. [2023-01-27 23:10:24,921 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 422 selfloop transitions, 457 changer transitions 30/909 dead transitions. [2023-01-27 23:10:24,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 909 transitions, 16624 flow [2023-01-27 23:10:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-27 23:10:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-27 23:10:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5003 transitions. [2023-01-27 23:10:24,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39896331738437 [2023-01-27 23:10:24,927 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5003 transitions. [2023-01-27 23:10:24,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5003 transitions. [2023-01-27 23:10:24,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:24,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5003 transitions. [2023-01-27 23:10:24,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 131.6578947368421) internal successors, (5003), 38 states have internal predecessors, (5003), 0 states have call successors, (0), 0 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 23:10:24,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 330.0) internal successors, (12870), 39 states have internal predecessors, (12870), 0 states have call successors, (0), 0 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 23:10:24,941 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 330.0) internal successors, (12870), 39 states have internal predecessors, (12870), 0 states have call successors, (0), 0 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 23:10:24,941 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 7428 flow. Second operand 38 states and 5003 transitions. [2023-01-27 23:10:24,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 909 transitions, 16624 flow [2023-01-27 23:10:25,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 909 transitions, 15834 flow, removed 188 selfloop flow, removed 19 redundant places. [2023-01-27 23:10:25,291 INFO L231 Difference]: Finished difference. Result has 308 places, 710 transitions, 13632 flow [2023-01-27 23:10:25,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13632, PETRI_PLACES=308, PETRI_TRANSITIONS=710} [2023-01-27 23:10:25,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-27 23:10:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 710 transitions, 13632 flow [2023-01-27 23:10:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.94117647058823) internal successors, (2175), 17 states have internal predecessors, (2175), 0 states have call successors, (0), 0 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 23:10:25,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:25,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:25,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:25,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:25,493 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 23:10:25,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 920637313, now seen corresponding path program 14 times [2023-01-27 23:10:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:25,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981680049] [2023-01-27 23:10:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981680049] [2023-01-27 23:10:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981680049] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500701013] [2023-01-27 23:10:25,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:10:25,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:25,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:25,649 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 23:10:25,661 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 23:10:25,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:25,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:25,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500701013] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:25,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:25,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:10:25,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258119340] [2023-01-27 23:10:25,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:25,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:10:25,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:25,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 710 transitions, 13632 flow. Second operand has 17 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 23:10:25,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:25,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:27,998 INFO L130 PetriNetUnfolder]: 2114/4234 cut-off events. [2023-01-27 23:10:27,999 INFO L131 PetriNetUnfolder]: For 51424/51424 co-relation queries the response was YES. [2023-01-27 23:10:28,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35699 conditions, 4234 events. 2114/4234 cut-off events. For 51424/51424 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31570 event pairs, 537 based on Foata normal form. 108/4341 useless extension candidates. Maximal degree in co-relation 35379. Up to 2830 conditions per place. [2023-01-27 23:10:28,045 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 601 selfloop transitions, 430 changer transitions 1/1032 dead transitions. [2023-01-27 23:10:28,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1032 transitions, 21754 flow [2023-01-27 23:10:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 23:10:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 23:10:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4701 transitions. [2023-01-27 23:10:28,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39570707070707073 [2023-01-27 23:10:28,051 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4701 transitions. [2023-01-27 23:10:28,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4701 transitions. [2023-01-27 23:10:28,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:28,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4701 transitions. [2023-01-27 23:10:28,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 130.58333333333334) internal successors, (4701), 36 states have internal predecessors, (4701), 0 states have call successors, (0), 0 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 23:10:28,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 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 23:10:28,065 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 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 23:10:28,065 INFO L175 Difference]: Start difference. First operand has 308 places, 710 transitions, 13632 flow. Second operand 36 states and 4701 transitions. [2023-01-27 23:10:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1032 transitions, 21754 flow [2023-01-27 23:10:28,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1032 transitions, 21077 flow, removed 332 selfloop flow, removed 3 redundant places. [2023-01-27 23:10:28,819 INFO L231 Difference]: Finished difference. Result has 355 places, 928 transitions, 19395 flow [2023-01-27 23:10:28,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=12948, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=19395, PETRI_PLACES=355, PETRI_TRANSITIONS=928} [2023-01-27 23:10:28,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2023-01-27 23:10:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 928 transitions, 19395 flow [2023-01-27 23:10:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 23:10:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:28,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:28,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:29,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:29,021 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 23:10:29,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash 742378723, now seen corresponding path program 15 times [2023-01-27 23:10:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874192020] [2023-01-27 23:10:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:29,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874192020] [2023-01-27 23:10:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874192020] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745663302] [2023-01-27 23:10:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:10:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:29,186 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 23:10:29,188 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 23:10:29,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:10:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:29,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745663302] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:29,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:29,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:10:29,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630295216] [2023-01-27 23:10:29,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:10:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:29,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 928 transitions, 19395 flow. Second operand has 17 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 23:10:29,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:29,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:29,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:34,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 23:10:36,213 INFO L130 PetriNetUnfolder]: 2412/4878 cut-off events. [2023-01-27 23:10:36,213 INFO L131 PetriNetUnfolder]: For 79413/79413 co-relation queries the response was YES. [2023-01-27 23:10:36,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44522 conditions, 4878 events. 2412/4878 cut-off events. For 79413/79413 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37878 event pairs, 174 based on Foata normal form. 62/4939 useless extension candidates. Maximal degree in co-relation 43896. Up to 1136 conditions per place. [2023-01-27 23:10:36,268 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 434 selfloop transitions, 773 changer transitions 23/1230 dead transitions. [2023-01-27 23:10:36,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1230 transitions, 26945 flow [2023-01-27 23:10:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 23:10:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 23:10:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6662 transitions. [2023-01-27 23:10:36,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958407605466429 [2023-01-27 23:10:36,278 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6662 transitions. [2023-01-27 23:10:36,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6662 transitions. [2023-01-27 23:10:36,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:36,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6662 transitions. [2023-01-27 23:10:36,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 130.62745098039215) internal successors, (6662), 51 states have internal predecessors, (6662), 0 states have call successors, (0), 0 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 23:10:36,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 330.0) internal successors, (17160), 52 states have internal predecessors, (17160), 0 states have call successors, (0), 0 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 23:10:36,301 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 330.0) internal successors, (17160), 52 states have internal predecessors, (17160), 0 states have call successors, (0), 0 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 23:10:36,301 INFO L175 Difference]: Start difference. First operand has 355 places, 928 transitions, 19395 flow. Second operand 51 states and 6662 transitions. [2023-01-27 23:10:36,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1230 transitions, 26945 flow [2023-01-27 23:10:37,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1230 transitions, 26215 flow, removed 343 selfloop flow, removed 4 redundant places. [2023-01-27 23:10:37,588 INFO L231 Difference]: Finished difference. Result has 415 places, 1071 transitions, 24598 flow [2023-01-27 23:10:37,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=18711, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=24598, PETRI_PLACES=415, PETRI_TRANSITIONS=1071} [2023-01-27 23:10:37,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 394 predicate places. [2023-01-27 23:10:37,589 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 1071 transitions, 24598 flow [2023-01-27 23:10:37,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 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 23:10:37,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:37,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:37,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:37,790 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 23:10:37,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1049589977, now seen corresponding path program 16 times [2023-01-27 23:10:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:37,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872565142] [2023-01-27 23:10:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872565142] [2023-01-27 23:10:37,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872565142] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145256924] [2023-01-27 23:10:37,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:10:37,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:37,974 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 23:10:37,976 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 23:10:38,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:10:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:38,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145256924] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:38,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:10:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165225872] [2023-01-27 23:10:38,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:10:38,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:38,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 1071 transitions, 24598 flow. Second operand has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:10:38,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:38,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:38,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:41,722 INFO L130 PetriNetUnfolder]: 2549/5227 cut-off events. [2023-01-27 23:10:41,722 INFO L131 PetriNetUnfolder]: For 98733/98733 co-relation queries the response was YES. [2023-01-27 23:10:41,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51009 conditions, 5227 events. 2549/5227 cut-off events. For 98733/98733 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41422 event pairs, 334 based on Foata normal form. 52/5278 useless extension candidates. Maximal degree in co-relation 50323. Up to 1682 conditions per place. [2023-01-27 23:10:41,783 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 535 selfloop transitions, 694 changer transitions 0/1229 dead transitions. [2023-01-27 23:10:41,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1229 transitions, 29925 flow [2023-01-27 23:10:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:10:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:10:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3680 transitions. [2023-01-27 23:10:41,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2023-01-27 23:10:41,787 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3680 transitions. [2023-01-27 23:10:41,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3680 transitions. [2023-01-27 23:10:41,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:41,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3680 transitions. [2023-01-27 23:10:41,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 131.42857142857142) internal successors, (3680), 28 states have internal predecessors, (3680), 0 states have call successors, (0), 0 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 23:10:41,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 23:10:41,798 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 23:10:41,798 INFO L175 Difference]: Start difference. First operand has 415 places, 1071 transitions, 24598 flow. Second operand 28 states and 3680 transitions. [2023-01-27 23:10:41,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1229 transitions, 29925 flow [2023-01-27 23:10:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1229 transitions, 28662 flow, removed 530 selfloop flow, removed 16 redundant places. [2023-01-27 23:10:43,624 INFO L231 Difference]: Finished difference. Result has 430 places, 1134 transitions, 27470 flow [2023-01-27 23:10:43,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=23355, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=27470, PETRI_PLACES=430, PETRI_TRANSITIONS=1134} [2023-01-27 23:10:43,625 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 409 predicate places. [2023-01-27 23:10:43,625 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1134 transitions, 27470 flow [2023-01-27 23:10:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:10:43,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:43,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:43,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-27 23:10:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:43,829 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 23:10:43,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -169893693, now seen corresponding path program 17 times [2023-01-27 23:10:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878962197] [2023-01-27 23:10:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878962197] [2023-01-27 23:10:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878962197] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:43,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852765905] [2023-01-27 23:10:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:10:43,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:43,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:43,974 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 23:10:43,995 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 23:10:44,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 23:10:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:44,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852765905] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:44,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-01-27 23:10:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692823987] [2023-01-27 23:10:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 23:10:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 23:10:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-01-27 23:10:44,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:44,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1134 transitions, 27470 flow. Second operand has 15 states, 15 states have (on average 128.13333333333333) internal successors, (1922), 15 states have internal predecessors, (1922), 0 states have call successors, (0), 0 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 23:10:44,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:44,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:44,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:46,937 INFO L130 PetriNetUnfolder]: 2990/6006 cut-off events. [2023-01-27 23:10:46,938 INFO L131 PetriNetUnfolder]: For 124460/124460 co-relation queries the response was YES. [2023-01-27 23:10:46,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62051 conditions, 6006 events. 2990/6006 cut-off events. For 124460/124460 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48091 event pairs, 96 based on Foata normal form. 24/6029 useless extension candidates. Maximal degree in co-relation 61332. Up to 4257 conditions per place. [2023-01-27 23:10:47,015 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 1118 selfloop transitions, 298 changer transitions 2/1418 dead transitions. [2023-01-27 23:10:47,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1418 transitions, 37546 flow [2023-01-27 23:10:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 23:10:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 23:10:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1581 transitions. [2023-01-27 23:10:47,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39924242424242423 [2023-01-27 23:10:47,017 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1581 transitions. [2023-01-27 23:10:47,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1581 transitions. [2023-01-27 23:10:47,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:47,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1581 transitions. [2023-01-27 23:10:47,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.75) internal successors, (1581), 12 states have internal predecessors, (1581), 0 states have call successors, (0), 0 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 23:10:47,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 23:10:47,021 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 23:10:47,021 INFO L175 Difference]: Start difference. First operand has 430 places, 1134 transitions, 27470 flow. Second operand 12 states and 1581 transitions. [2023-01-27 23:10:47,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1418 transitions, 37546 flow [2023-01-27 23:10:49,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1418 transitions, 36904 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-01-27 23:10:49,508 INFO L231 Difference]: Finished difference. Result has 429 places, 1296 transitions, 32749 flow [2023-01-27 23:10:49,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=26832, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=856, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=32749, PETRI_PLACES=429, PETRI_TRANSITIONS=1296} [2023-01-27 23:10:49,509 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2023-01-27 23:10:49,509 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1296 transitions, 32749 flow [2023-01-27 23:10:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.13333333333333) internal successors, (1922), 15 states have internal predecessors, (1922), 0 states have call successors, (0), 0 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 23:10:49,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:49,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:49,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:49,714 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,SelfDestructingSolverStorable23 [2023-01-27 23:10:49,715 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 23:10:49,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 995735115, now seen corresponding path program 18 times [2023-01-27 23:10:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008669414] [2023-01-27 23:10:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:49,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:49,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008669414] [2023-01-27 23:10:49,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008669414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:49,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540148793] [2023-01-27 23:10:49,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:10:49,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:49,917 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 23:10:49,936 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 23:10:50,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:10:50,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:50,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:50,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540148793] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:50,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:50,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:10:50,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720931786] [2023-01-27 23:10:50,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:50,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:50,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:50,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:10:50,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:50,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1296 transitions, 32749 flow. Second operand has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:10:50,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:50,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:50,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:54,948 INFO L130 PetriNetUnfolder]: 3713/7451 cut-off events. [2023-01-27 23:10:54,948 INFO L131 PetriNetUnfolder]: For 157970/157970 co-relation queries the response was YES. [2023-01-27 23:10:55,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78712 conditions, 7451 events. 3713/7451 cut-off events. For 157970/157970 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 61498 event pairs, 93 based on Foata normal form. 90/7540 useless extension candidates. Maximal degree in co-relation 78422. Up to 3442 conditions per place. [2023-01-27 23:10:55,047 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1197 selfloop transitions, 598 changer transitions 4/1799 dead transitions. [2023-01-27 23:10:55,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1799 transitions, 48566 flow [2023-01-27 23:10:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:10:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:10:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4188 transitions. [2023-01-27 23:10:55,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965909090909091 [2023-01-27 23:10:55,052 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4188 transitions. [2023-01-27 23:10:55,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4188 transitions. [2023-01-27 23:10:55,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:55,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4188 transitions. [2023-01-27 23:10:55,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 130.875) internal successors, (4188), 32 states have internal predecessors, (4188), 0 states have call successors, (0), 0 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 23:10:55,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 330.0) internal successors, (10890), 33 states have internal predecessors, (10890), 0 states have call successors, (0), 0 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 23:10:55,066 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 330.0) internal successors, (10890), 33 states have internal predecessors, (10890), 0 states have call successors, (0), 0 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 23:10:55,066 INFO L175 Difference]: Start difference. First operand has 429 places, 1296 transitions, 32749 flow. Second operand 32 states and 4188 transitions. [2023-01-27 23:10:55,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1799 transitions, 48566 flow [2023-01-27 23:10:59,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1799 transitions, 48093 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-01-27 23:10:59,142 INFO L231 Difference]: Finished difference. Result has 474 places, 1546 transitions, 41570 flow [2023-01-27 23:10:59,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=32289, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=41570, PETRI_PLACES=474, PETRI_TRANSITIONS=1546} [2023-01-27 23:10:59,143 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 453 predicate places. [2023-01-27 23:10:59,143 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1546 transitions, 41570 flow [2023-01-27 23:10:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:10:59,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:59,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:59,149 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 23:10:59,347 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,SelfDestructingSolverStorable24 [2023-01-27 23:10:59,347 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 23:10:59,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1549239431, now seen corresponding path program 19 times [2023-01-27 23:10:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714913777] [2023-01-27 23:10:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714913777] [2023-01-27 23:10:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714913777] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295108553] [2023-01-27 23:10:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:10:59,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:59,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:59,573 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 23:10:59,595 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 23:10:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:10:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:59,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:59,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295108553] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:59,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:59,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:10:59,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910073586] [2023-01-27 23:10:59,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:59,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:10:59,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:10:59,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1546 transitions, 41570 flow. Second operand has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:10:59,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:59,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:10:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:07,603 INFO L130 PetriNetUnfolder]: 3851/7795 cut-off events. [2023-01-27 23:11:07,603 INFO L131 PetriNetUnfolder]: For 213624/213624 co-relation queries the response was YES. [2023-01-27 23:11:07,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87587 conditions, 7795 events. 3851/7795 cut-off events. For 213624/213624 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 65559 event pairs, 52 based on Foata normal form. 46/7840 useless extension candidates. Maximal degree in co-relation 86824. Up to 1807 conditions per place. [2023-01-27 23:11:07,723 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 786 selfloop transitions, 1156 changer transitions 25/1967 dead transitions. [2023-01-27 23:11:07,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1967 transitions, 54289 flow [2023-01-27 23:11:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-27 23:11:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-27 23:11:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6436 transitions. [2023-01-27 23:11:07,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39802102659245514 [2023-01-27 23:11:07,728 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6436 transitions. [2023-01-27 23:11:07,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6436 transitions. [2023-01-27 23:11:07,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:07,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6436 transitions. [2023-01-27 23:11:07,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 131.3469387755102) internal successors, (6436), 49 states have internal predecessors, (6436), 0 states have call successors, (0), 0 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 23:11:07,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 330.0) internal successors, (16500), 50 states have internal predecessors, (16500), 0 states have call successors, (0), 0 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 23:11:07,745 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 330.0) internal successors, (16500), 50 states have internal predecessors, (16500), 0 states have call successors, (0), 0 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 23:11:07,745 INFO L175 Difference]: Start difference. First operand has 474 places, 1546 transitions, 41570 flow. Second operand 49 states and 6436 transitions. [2023-01-27 23:11:07,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1967 transitions, 54289 flow [2023-01-27 23:11:13,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1967 transitions, 53242 flow, removed 444 selfloop flow, removed 6 redundant places. [2023-01-27 23:11:13,163 INFO L231 Difference]: Finished difference. Result has 532 places, 1693 transitions, 48670 flow [2023-01-27 23:11:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=48670, PETRI_PLACES=532, PETRI_TRANSITIONS=1693} [2023-01-27 23:11:13,165 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 511 predicate places. [2023-01-27 23:11:13,165 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1693 transitions, 48670 flow [2023-01-27 23:11:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.83333333333333) internal successors, (2301), 18 states have internal predecessors, (2301), 0 states have call successors, (0), 0 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 23:11:13,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:13,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:13,173 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 23:11:13,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 23:11:13,371 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 23:11:13,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash -242729269, now seen corresponding path program 20 times [2023-01-27 23:11:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798846768] [2023-01-27 23:11:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:13,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798846768] [2023-01-27 23:11:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798846768] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698926054] [2023-01-27 23:11:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:11:13,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:13,638 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 23:11:13,640 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 23:11:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:11:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:11:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:13,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698926054] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:13,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:11:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996150338] [2023-01-27 23:11:13,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:11:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:11:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:11:13,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:11:13,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1693 transitions, 48670 flow. Second operand has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:11:13,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:13,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:11:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:18,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 23:11:23,052 INFO L130 PetriNetUnfolder]: 4255/8746 cut-off events. [2023-01-27 23:11:23,052 INFO L131 PetriNetUnfolder]: For 274910/274910 co-relation queries the response was YES. [2023-01-27 23:11:23,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104311 conditions, 8746 events. 4255/8746 cut-off events. For 274910/274910 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 75971 event pairs, 85 based on Foata normal form. 32/8777 useless extension candidates. Maximal degree in co-relation 103659. Up to 2432 conditions per place. [2023-01-27 23:11:23,190 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1103 selfloop transitions, 999 changer transitions 7/2109 dead transitions. [2023-01-27 23:11:23,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 2109 transitions, 63094 flow [2023-01-27 23:11:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 23:11:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 23:11:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4623 transitions. [2023-01-27 23:11:23,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025974025974026 [2023-01-27 23:11:23,195 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4623 transitions. [2023-01-27 23:11:23,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4623 transitions. [2023-01-27 23:11:23,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:23,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4623 transitions. [2023-01-27 23:11:23,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 132.0857142857143) internal successors, (4623), 35 states have internal predecessors, (4623), 0 states have call successors, (0), 0 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 23:11:23,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 330.0) internal successors, (11880), 36 states have internal predecessors, (11880), 0 states have call successors, (0), 0 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 23:11:23,208 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 330.0) internal successors, (11880), 36 states have internal predecessors, (11880), 0 states have call successors, (0), 0 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 23:11:23,208 INFO L175 Difference]: Start difference. First operand has 532 places, 1693 transitions, 48670 flow. Second operand 35 states and 4623 transitions. [2023-01-27 23:11:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 2109 transitions, 63094 flow [2023-01-27 23:11:30,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2109 transitions, 60413 flow, removed 712 selfloop flow, removed 25 redundant places. [2023-01-27 23:11:30,939 INFO L231 Difference]: Finished difference. Result has 551 places, 1885 transitions, 55717 flow [2023-01-27 23:11:30,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=46290, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=819, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=55717, PETRI_PLACES=551, PETRI_TRANSITIONS=1885} [2023-01-27 23:11:30,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 530 predicate places. [2023-01-27 23:11:30,941 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1885 transitions, 55717 flow [2023-01-27 23:11:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:11:30,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:30,941 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:30,947 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 23:11:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:31,146 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 23:11:31,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1500576710, now seen corresponding path program 21 times [2023-01-27 23:11:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505694978] [2023-01-27 23:11:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505694978] [2023-01-27 23:11:31,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505694978] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806284933] [2023-01-27 23:11:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:11:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:31,317 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 23:11:31,319 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 23:11:31,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:11:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:11:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:31,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806284933] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:31,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:31,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-27 23:11:31,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347914475] [2023-01-27 23:11:31,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:31,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 23:11:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:31,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 23:11:31,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-27 23:11:31,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:11:31,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1885 transitions, 55717 flow. Second operand has 15 states, 15 states have (on average 128.33333333333334) internal successors, (1925), 15 states have internal predecessors, (1925), 0 states have call successors, (0), 0 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 23:11:31,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:31,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:11:31,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:37,575 INFO L130 PetriNetUnfolder]: 4274/8779 cut-off events. [2023-01-27 23:11:37,576 INFO L131 PetriNetUnfolder]: For 310604/310604 co-relation queries the response was YES. [2023-01-27 23:11:37,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107514 conditions, 8779 events. 4274/8779 cut-off events. For 310604/310604 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 76395 event pairs, 101 based on Foata normal form. 8/8786 useless extension candidates. Maximal degree in co-relation 106921. Up to 5224 conditions per place. [2023-01-27 23:11:37,791 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 1013 selfloop transitions, 908 changer transitions 1/1922 dead transitions. [2023-01-27 23:11:37,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1922 transitions, 60162 flow [2023-01-27 23:11:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 23:11:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 23:11:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1462 transitions. [2023-01-27 23:11:37,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027548209366391 [2023-01-27 23:11:37,793 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1462 transitions. [2023-01-27 23:11:37,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1462 transitions. [2023-01-27 23:11:37,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:37,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1462 transitions. [2023-01-27 23:11:37,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 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 23:11:37,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 23:11:37,797 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 23:11:37,797 INFO L175 Difference]: Start difference. First operand has 551 places, 1885 transitions, 55717 flow. Second operand 11 states and 1462 transitions. [2023-01-27 23:11:37,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1922 transitions, 60162 flow [2023-01-27 23:11:45,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1922 transitions, 59226 flow, removed 344 selfloop flow, removed 13 redundant places. [2023-01-27 23:11:45,792 INFO L231 Difference]: Finished difference. Result has 551 places, 1889 transitions, 56718 flow [2023-01-27 23:11:45,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=54784, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=904, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=56718, PETRI_PLACES=551, PETRI_TRANSITIONS=1889} [2023-01-27 23:11:45,793 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 530 predicate places. [2023-01-27 23:11:45,794 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1889 transitions, 56718 flow [2023-01-27 23:11:45,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.33333333333334) internal successors, (1925), 15 states have internal predecessors, (1925), 0 states have call successors, (0), 0 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 23:11:45,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:45,794 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:45,801 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 23:11:45,998 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,SelfDestructingSolverStorable27 [2023-01-27 23:11:45,999 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 23:11:45,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash 882819786, now seen corresponding path program 22 times [2023-01-27 23:11:45,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454422864] [2023-01-27 23:11:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:46,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454422864] [2023-01-27 23:11:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454422864] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100633703] [2023-01-27 23:11:46,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:11:46,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:46,165 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 23:11:46,168 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 23:11:46,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:11:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:11:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100633703] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:46,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:11:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063966723] [2023-01-27 23:11:46,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:11:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:11:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:11:46,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:11:46,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1889 transitions, 56718 flow. Second operand has 17 states, 17 states have (on average 128.11764705882354) internal successors, (2178), 17 states have internal predecessors, (2178), 0 states have call successors, (0), 0 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 23:11:46,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:46,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:11:46,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:52,224 INFO L130 PetriNetUnfolder]: 4318/8859 cut-off events. [2023-01-27 23:11:52,224 INFO L131 PetriNetUnfolder]: For 323911/323911 co-relation queries the response was YES. [2023-01-27 23:11:52,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108557 conditions, 8859 events. 4318/8859 cut-off events. For 323911/323911 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 77047 event pairs, 104 based on Foata normal form. 12/8870 useless extension candidates. Maximal degree in co-relation 107971. Up to 5260 conditions per place. [2023-01-27 23:11:52,510 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1018 selfloop transitions, 923 changer transitions 1/1942 dead transitions. [2023-01-27 23:11:52,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1942 transitions, 61481 flow [2023-01-27 23:11:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 23:11:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 23:11:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1983 transitions. [2023-01-27 23:11:52,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40060606060606063 [2023-01-27 23:11:52,512 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1983 transitions. [2023-01-27 23:11:52,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1983 transitions. [2023-01-27 23:11:52,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:52,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1983 transitions. [2023-01-27 23:11:52,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 132.2) internal successors, (1983), 15 states have internal predecessors, (1983), 0 states have call successors, (0), 0 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 23:11:52,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 23:11:52,517 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 23:11:52,517 INFO L175 Difference]: Start difference. First operand has 551 places, 1889 transitions, 56718 flow. Second operand 15 states and 1983 transitions. [2023-01-27 23:11:52,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1942 transitions, 61481 flow [2023-01-27 23:12:00,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1942 transitions, 60815 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-01-27 23:12:00,290 INFO L231 Difference]: Finished difference. Result has 567 places, 1901 transitions, 58303 flow [2023-01-27 23:12:00,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=56066, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=913, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=58303, PETRI_PLACES=567, PETRI_TRANSITIONS=1901} [2023-01-27 23:12:00,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 546 predicate places. [2023-01-27 23:12:00,292 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1901 transitions, 58303 flow [2023-01-27 23:12:00,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.11764705882354) internal successors, (2178), 17 states have internal predecessors, (2178), 0 states have call successors, (0), 0 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 23:12:00,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:00,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 23:12:00,496 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,SelfDestructingSolverStorable28 [2023-01-27 23:12:00,497 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 23:12:00,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -692008528, now seen corresponding path program 23 times [2023-01-27 23:12:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214456977] [2023-01-27 23:12:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214456977] [2023-01-27 23:12:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214456977] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058291120] [2023-01-27 23:12:00,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:12:00,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:00,696 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 23:12:00,697 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 23:12:00,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:12:00,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:12:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:12:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:00,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058291120] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:00,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:00,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:12:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782772313] [2023-01-27 23:12:00,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:12:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:12:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:12:00,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:12:00,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1901 transitions, 58303 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 23:12:00,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:00,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:12:00,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:08,296 INFO L130 PetriNetUnfolder]: 4495/9223 cut-off events. [2023-01-27 23:12:08,297 INFO L131 PetriNetUnfolder]: For 353486/353486 co-relation queries the response was YES. [2023-01-27 23:12:08,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114461 conditions, 9223 events. 4495/9223 cut-off events. For 353486/353486 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 80862 event pairs, 64 based on Foata normal form. 46/9268 useless extension candidates. Maximal degree in co-relation 113973. Up to 3236 conditions per place. [2023-01-27 23:12:08,452 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1011 selfloop transitions, 1052 changer transitions 5/2068 dead transitions. [2023-01-27 23:12:08,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 2068 transitions, 65653 flow [2023-01-27 23:12:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 23:12:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 23:12:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4721 transitions. [2023-01-27 23:12:08,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973905723905724 [2023-01-27 23:12:08,456 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4721 transitions. [2023-01-27 23:12:08,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4721 transitions. [2023-01-27 23:12:08,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:08,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4721 transitions. [2023-01-27 23:12:08,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 131.13888888888889) internal successors, (4721), 36 states have internal predecessors, (4721), 0 states have call successors, (0), 0 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 23:12:08,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 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 23:12:08,466 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 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 23:12:08,466 INFO L175 Difference]: Start difference. First operand has 567 places, 1901 transitions, 58303 flow. Second operand 36 states and 4721 transitions. [2023-01-27 23:12:08,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 2068 transitions, 65653 flow [2023-01-27 23:12:16,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 2068 transitions, 64851 flow, removed 81 selfloop flow, removed 8 redundant places. [2023-01-27 23:12:16,681 INFO L231 Difference]: Finished difference. Result has 607 places, 1976 transitions, 62096 flow [2023-01-27 23:12:16,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=57361, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=982, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=62096, PETRI_PLACES=607, PETRI_TRANSITIONS=1976} [2023-01-27 23:12:16,683 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 586 predicate places. [2023-01-27 23:12:16,683 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 1976 transitions, 62096 flow [2023-01-27 23:12:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 23:12:16,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:16,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:16,689 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 23:12:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:16,889 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 23:12:16,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -662084278, now seen corresponding path program 24 times [2023-01-27 23:12:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230271118] [2023-01-27 23:12:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:16,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:12:17,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230271118] [2023-01-27 23:12:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230271118] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249606930] [2023-01-27 23:12:17,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:12:17,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:17,021 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 23:12:17,022 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 23:12:17,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 23:12:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:12:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:12:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249606930] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:17,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:17,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-01-27 23:12:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632520013] [2023-01-27 23:12:17,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:12:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:12:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:12:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:12:17,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1976 transitions, 62096 flow. Second operand has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 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 23:12:17,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:17,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:12:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:24,758 INFO L130 PetriNetUnfolder]: 4653/9516 cut-off events. [2023-01-27 23:12:24,759 INFO L131 PetriNetUnfolder]: For 405870/405870 co-relation queries the response was YES. [2023-01-27 23:12:24,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122068 conditions, 9516 events. 4653/9516 cut-off events. For 405870/405870 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 83690 event pairs, 143 based on Foata normal form. 32/9547 useless extension candidates. Maximal degree in co-relation 121444. Up to 7446 conditions per place. [2023-01-27 23:12:24,918 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1572 selfloop transitions, 528 changer transitions 1/2101 dead transitions. [2023-01-27 23:12:24,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 2101 transitions, 69365 flow [2023-01-27 23:12:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:12:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:12:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3167 transitions. [2023-01-27 23:12:24,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998737373737374 [2023-01-27 23:12:24,920 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3167 transitions. [2023-01-27 23:12:24,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3167 transitions. [2023-01-27 23:12:24,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:24,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3167 transitions. [2023-01-27 23:12:24,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 131.95833333333334) internal successors, (3167), 24 states have internal predecessors, (3167), 0 states have call successors, (0), 0 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 23:12:24,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:12:24,928 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:12:24,928 INFO L175 Difference]: Start difference. First operand has 607 places, 1976 transitions, 62096 flow. Second operand 24 states and 3167 transitions. [2023-01-27 23:12:24,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 2101 transitions, 69365 flow [2023-01-27 23:12:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 2101 transitions, 65703 flow, removed 635 selfloop flow, removed 17 redundant places. [2023-01-27 23:12:34,636 INFO L231 Difference]: Finished difference. Result has 624 places, 2015 transitions, 61768 flow [2023-01-27 23:12:34,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=59008, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=61768, PETRI_PLACES=624, PETRI_TRANSITIONS=2015} [2023-01-27 23:12:34,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 603 predicate places. [2023-01-27 23:12:34,637 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 2015 transitions, 61768 flow [2023-01-27 23:12:34,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 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 23:12:34,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:34,638 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:34,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 23:12:34,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:34,838 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 23:12:34,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash 455510348, now seen corresponding path program 25 times [2023-01-27 23:12:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:34,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103874551] [2023-01-27 23:12:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103874551] [2023-01-27 23:12:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103874551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194517473] [2023-01-27 23:12:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:12:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:34,995 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 23:12:34,996 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 23:12:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:12:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:35,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194517473] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:35,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:35,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:12:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194770171] [2023-01-27 23:12:35,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:12:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:12:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:12:35,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:12:35,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 2015 transitions, 61768 flow. Second operand has 17 states, 17 states have (on average 128.1764705882353) internal successors, (2179), 17 states have internal predecessors, (2179), 0 states have call successors, (0), 0 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 23:12:35,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:35,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:12:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:44,407 INFO L130 PetriNetUnfolder]: 4948/10224 cut-off events. [2023-01-27 23:12:44,407 INFO L131 PetriNetUnfolder]: For 436917/436917 co-relation queries the response was YES. [2023-01-27 23:12:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128652 conditions, 10224 events. 4948/10224 cut-off events. For 436917/436917 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 91504 event pairs, 80 based on Foata normal form. 74/10297 useless extension candidates. Maximal degree in co-relation 128022. Up to 4993 conditions per place. [2023-01-27 23:12:44,574 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1417 selfloop transitions, 794 changer transitions 7/2218 dead transitions. [2023-01-27 23:12:44,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 2218 transitions, 70923 flow [2023-01-27 23:12:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:12:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:12:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3695 transitions. [2023-01-27 23:12:44,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998917748917749 [2023-01-27 23:12:44,577 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3695 transitions. [2023-01-27 23:12:44,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3695 transitions. [2023-01-27 23:12:44,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:44,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3695 transitions. [2023-01-27 23:12:44,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 131.96428571428572) internal successors, (3695), 28 states have internal predecessors, (3695), 0 states have call successors, (0), 0 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 23:12:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 23:12:44,584 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 23:12:44,584 INFO L175 Difference]: Start difference. First operand has 624 places, 2015 transitions, 61768 flow. Second operand 28 states and 3695 transitions. [2023-01-27 23:12:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 2218 transitions, 70923 flow [2023-01-27 23:12:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 2218 transitions, 70269 flow, removed 181 selfloop flow, removed 8 redundant places. [2023-01-27 23:12:54,108 INFO L231 Difference]: Finished difference. Result has 650 places, 2107 transitions, 66764 flow [2023-01-27 23:12:54,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=60948, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=701, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=66764, PETRI_PLACES=650, PETRI_TRANSITIONS=2107} [2023-01-27 23:12:54,110 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 629 predicate places. [2023-01-27 23:12:54,110 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 2107 transitions, 66764 flow [2023-01-27 23:12:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.1764705882353) internal successors, (2179), 17 states have internal predecessors, (2179), 0 states have call successors, (0), 0 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 23:12:54,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:54,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:54,118 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 23:12:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:54,316 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 23:12:54,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1666233606, now seen corresponding path program 26 times [2023-01-27 23:12:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759360932] [2023-01-27 23:12:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:54,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759360932] [2023-01-27 23:12:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759360932] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098945957] [2023-01-27 23:12:54,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:12:54,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:54,493 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 23:12:54,520 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 23:12:54,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:12:54,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:12:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:12:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:54,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:12:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098945957] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:54,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:54,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:12:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416488420] [2023-01-27 23:12:54,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:12:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:12:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:12:54,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:12:54,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 2107 transitions, 66764 flow. Second operand has 18 states, 18 states have (on average 128.22222222222223) internal successors, (2308), 18 states have internal predecessors, (2308), 0 states have call successors, (0), 0 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 23:12:54,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:54,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:12:54,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:03,853 INFO L130 PetriNetUnfolder]: 4988/10277 cut-off events. [2023-01-27 23:13:03,854 INFO L131 PetriNetUnfolder]: For 494973/494973 co-relation queries the response was YES. [2023-01-27 23:13:03,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133915 conditions, 10277 events. 4988/10277 cut-off events. For 494973/494973 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 92080 event pairs, 1395 based on Foata normal form. 20/10296 useless extension candidates. Maximal degree in co-relation 133429. Up to 6703 conditions per place. [2023-01-27 23:13:04,028 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1771 selfloop transitions, 439 changer transitions 0/2210 dead transitions. [2023-01-27 23:13:04,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 2210 transitions, 73191 flow [2023-01-27 23:13:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:13:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:13:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3157 transitions. [2023-01-27 23:13:04,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39861111111111114 [2023-01-27 23:13:04,031 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3157 transitions. [2023-01-27 23:13:04,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3157 transitions. [2023-01-27 23:13:04,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:04,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3157 transitions. [2023-01-27 23:13:04,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 131.54166666666666) internal successors, (3157), 24 states have internal predecessors, (3157), 0 states have call successors, (0), 0 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 23:13:04,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:13:04,036 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:13:04,036 INFO L175 Difference]: Start difference. First operand has 650 places, 2107 transitions, 66764 flow. Second operand 24 states and 3157 transitions. [2023-01-27 23:13:04,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 2210 transitions, 73191 flow [2023-01-27 23:13:15,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 2210 transitions, 71195 flow, removed 773 selfloop flow, removed 25 redundant places. [2023-01-27 23:13:15,360 INFO L231 Difference]: Finished difference. Result has 654 places, 2140 transitions, 67228 flow [2023-01-27 23:13:15,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=64700, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=67228, PETRI_PLACES=654, PETRI_TRANSITIONS=2140} [2023-01-27 23:13:15,361 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 633 predicate places. [2023-01-27 23:13:15,361 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 2140 transitions, 67228 flow [2023-01-27 23:13:15,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.22222222222223) internal successors, (2308), 18 states have internal predecessors, (2308), 0 states have call successors, (0), 0 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 23:13:15,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:15,362 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:15,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-27 23:13:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:15,562 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 23:13:15,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1260845094, now seen corresponding path program 27 times [2023-01-27 23:13:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404719320] [2023-01-27 23:13:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:15,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:15,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404719320] [2023-01-27 23:13:15,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404719320] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:15,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853353124] [2023-01-27 23:13:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:13:15,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:15,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:15,709 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 23:13:15,713 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 23:13:15,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:13:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:13:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:13:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:13:16,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853353124] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:16,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:16,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:13:16,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094657568] [2023-01-27 23:13:16,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:16,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:13:16,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:13:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:13:16,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:13:16,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 2140 transitions, 67228 flow. Second operand has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:13:16,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:16,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:13:16,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:25,255 INFO L130 PetriNetUnfolder]: 5263/10896 cut-off events. [2023-01-27 23:13:25,256 INFO L131 PetriNetUnfolder]: For 491116/491116 co-relation queries the response was YES. [2023-01-27 23:13:25,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137079 conditions, 10896 events. 5263/10896 cut-off events. For 491116/491116 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 98875 event pairs, 1369 based on Foata normal form. 14/10909 useless extension candidates. Maximal degree in co-relation 136625. Up to 6040 conditions per place. [2023-01-27 23:13:25,434 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1785 selfloop transitions, 520 changer transitions 13/2318 dead transitions. [2023-01-27 23:13:25,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 2318 transitions, 75618 flow [2023-01-27 23:13:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 23:13:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 23:13:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2761 transitions. [2023-01-27 23:13:25,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984126984126984 [2023-01-27 23:13:25,437 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2761 transitions. [2023-01-27 23:13:25,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2761 transitions. [2023-01-27 23:13:25,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:25,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2761 transitions. [2023-01-27 23:13:25,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.47619047619048) internal successors, (2761), 21 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 23:13:25,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 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 23:13:25,441 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 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 23:13:25,441 INFO L175 Difference]: Start difference. First operand has 654 places, 2140 transitions, 67228 flow. Second operand 21 states and 2761 transitions. [2023-01-27 23:13:25,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 2318 transitions, 75618 flow [2023-01-27 23:13:35,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 2318 transitions, 74361 flow, removed 244 selfloop flow, removed 15 redundant places. [2023-01-27 23:13:35,956 INFO L231 Difference]: Finished difference. Result has 666 places, 2221 transitions, 69870 flow [2023-01-27 23:13:35,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=65934, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=69870, PETRI_PLACES=666, PETRI_TRANSITIONS=2221} [2023-01-27 23:13:35,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 645 predicate places. [2023-01-27 23:13:35,959 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2221 transitions, 69870 flow [2023-01-27 23:13:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:13:35,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:35,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 23:13:36,165 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,SelfDestructingSolverStorable33 [2023-01-27 23:13:36,165 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 23:13:36,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1301645282, now seen corresponding path program 28 times [2023-01-27 23:13:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:36,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656655112] [2023-01-27 23:13:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:36,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656655112] [2023-01-27 23:13:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656655112] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495911240] [2023-01-27 23:13:36,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:13:36,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:36,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:36,343 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 23:13:36,344 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 23:13:36,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:13:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:13:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:13:36,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:13:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495911240] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:36,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:36,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:13:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296312095] [2023-01-27 23:13:36,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:13:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:13:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:13:36,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:13:36,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2221 transitions, 69870 flow. Second operand has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:13:36,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:36,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:13:36,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:45,142 INFO L130 PetriNetUnfolder]: 5289/10928 cut-off events. [2023-01-27 23:13:45,143 INFO L131 PetriNetUnfolder]: For 512269/512269 co-relation queries the response was YES. [2023-01-27 23:13:45,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139802 conditions, 10928 events. 5289/10928 cut-off events. For 512269/512269 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 99102 event pairs, 1493 based on Foata normal form. 10/10937 useless extension candidates. Maximal degree in co-relation 139397. Up to 6277 conditions per place. [2023-01-27 23:13:45,322 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1914 selfloop transitions, 367 changer transitions 9/2290 dead transitions. [2023-01-27 23:13:45,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 2290 transitions, 75887 flow [2023-01-27 23:13:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:13:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 23:13:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2614 transitions. [2023-01-27 23:13:45,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39606060606060606 [2023-01-27 23:13:45,324 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2614 transitions. [2023-01-27 23:13:45,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2614 transitions. [2023-01-27 23:13:45,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:45,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2614 transitions. [2023-01-27 23:13:45,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 130.7) internal successors, (2614), 20 states have internal predecessors, (2614), 0 states have call successors, (0), 0 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 23:13:45,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 330.0) internal successors, (6930), 21 states have internal predecessors, (6930), 0 states have call successors, (0), 0 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 23:13:45,329 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 330.0) internal successors, (6930), 21 states have internal predecessors, (6930), 0 states have call successors, (0), 0 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 23:13:45,329 INFO L175 Difference]: Start difference. First operand has 666 places, 2221 transitions, 69870 flow. Second operand 20 states and 2614 transitions. [2023-01-27 23:13:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 2290 transitions, 75887 flow [2023-01-27 23:13:55,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 2290 transitions, 75722 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-01-27 23:13:56,030 INFO L231 Difference]: Finished difference. Result has 682 places, 2225 transitions, 71026 flow [2023-01-27 23:13:56,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=69456, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=71026, PETRI_PLACES=682, PETRI_TRANSITIONS=2225} [2023-01-27 23:13:56,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 661 predicate places. [2023-01-27 23:13:56,033 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 2225 transitions, 71026 flow [2023-01-27 23:13:56,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:13:56,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:56,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:56,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-27 23:13:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:56,234 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 23:13:56,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash 719946662, now seen corresponding path program 29 times [2023-01-27 23:13:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070410353] [2023-01-27 23:13:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:56,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070410353] [2023-01-27 23:13:56,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070410353] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485592543] [2023-01-27 23:13:56,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:13:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:56,381 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 23:13:56,387 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 23:13:56,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:13:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:13:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:56,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485592543] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:56,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:56,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-27 23:13:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289567147] [2023-01-27 23:13:56,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:13:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:13:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:13:56,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:13:56,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 2225 transitions, 71026 flow. Second operand has 16 states, 16 states have (on average 128.0) internal successors, (2048), 16 states have internal predecessors, (2048), 0 states have call successors, (0), 0 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 23:13:56,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:56,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:13:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:05,451 INFO L130 PetriNetUnfolder]: 5354/11020 cut-off events. [2023-01-27 23:14:05,451 INFO L131 PetriNetUnfolder]: For 550886/550886 co-relation queries the response was YES. [2023-01-27 23:14:05,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144257 conditions, 11020 events. 5354/11020 cut-off events. For 550886/550886 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 99807 event pairs, 2048 based on Foata normal form. 44/11063 useless extension candidates. Maximal degree in co-relation 143831. Up to 10183 conditions per place. [2023-01-27 23:14:05,638 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2050 selfloop transitions, 268 changer transitions 0/2318 dead transitions. [2023-01-27 23:14:05,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 2318 transitions, 77662 flow [2023-01-27 23:14:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:14:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:14:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3021 transitions. [2023-01-27 23:14:05,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39802371541501974 [2023-01-27 23:14:05,641 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3021 transitions. [2023-01-27 23:14:05,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3021 transitions. [2023-01-27 23:14:05,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:05,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3021 transitions. [2023-01-27 23:14:05,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 131.34782608695653) internal successors, (3021), 23 states have internal predecessors, (3021), 0 states have call successors, (0), 0 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 23:14:05,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 23:14:05,648 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 23:14:05,648 INFO L175 Difference]: Start difference. First operand has 682 places, 2225 transitions, 71026 flow. Second operand 23 states and 3021 transitions. [2023-01-27 23:14:05,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 2318 transitions, 77662 flow [2023-01-27 23:14:16,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 2318 transitions, 77281 flow, removed 78 selfloop flow, removed 12 redundant places. [2023-01-27 23:14:16,571 INFO L231 Difference]: Finished difference. Result has 694 places, 2250 transitions, 72305 flow [2023-01-27 23:14:16,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=70430, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=72305, PETRI_PLACES=694, PETRI_TRANSITIONS=2250} [2023-01-27 23:14:16,572 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 673 predicate places. [2023-01-27 23:14:16,573 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 2250 transitions, 72305 flow [2023-01-27 23:14:16,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 128.0) internal successors, (2048), 16 states have internal predecessors, (2048), 0 states have call successors, (0), 0 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 23:14:16,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:16,573 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:16,581 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 23:14:16,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:16,778 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:16,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash -965583348, now seen corresponding path program 30 times [2023-01-27 23:14:16,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188334755] [2023-01-27 23:14:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188334755] [2023-01-27 23:14:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188334755] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191394304] [2023-01-27 23:14:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:14:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:16,922 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 23:14:16,924 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 23:14:17,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:14:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:14:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191394304] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:17,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:17,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-27 23:14:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930006110] [2023-01-27 23:14:17,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:17,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:14:17,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:14:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:14:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:14:17,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 2250 transitions, 72305 flow. Second operand has 16 states, 16 states have (on average 128.1875) internal successors, (2051), 16 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 23:14:17,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:17,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:14:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:26,678 INFO L130 PetriNetUnfolder]: 5492/11280 cut-off events. [2023-01-27 23:14:26,678 INFO L131 PetriNetUnfolder]: For 588304/588304 co-relation queries the response was YES. [2023-01-27 23:14:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148754 conditions, 11280 events. 5492/11280 cut-off events. For 588304/588304 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 102461 event pairs, 2153 based on Foata normal form. 46/11325 useless extension candidates. Maximal degree in co-relation 148332. Up to 10668 conditions per place. [2023-01-27 23:14:26,889 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2197 selfloop transitions, 191 changer transitions 0/2388 dead transitions. [2023-01-27 23:14:26,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 2388 transitions, 80567 flow [2023-01-27 23:14:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:14:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:14:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3815 transitions. [2023-01-27 23:14:26,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3986415882967607 [2023-01-27 23:14:26,893 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3815 transitions. [2023-01-27 23:14:26,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3815 transitions. [2023-01-27 23:14:26,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:26,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3815 transitions. [2023-01-27 23:14:26,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 131.55172413793105) internal successors, (3815), 29 states have internal predecessors, (3815), 0 states have call successors, (0), 0 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 23:14:26,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:14:26,903 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:14:26,903 INFO L175 Difference]: Start difference. First operand has 694 places, 2250 transitions, 72305 flow. Second operand 29 states and 3815 transitions. [2023-01-27 23:14:26,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 2388 transitions, 80567 flow [2023-01-27 23:14:38,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 2388 transitions, 80121 flow, removed 174 selfloop flow, removed 7 redundant places. [2023-01-27 23:14:38,400 INFO L231 Difference]: Finished difference. Result has 731 places, 2300 transitions, 74531 flow [2023-01-27 23:14:38,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=71809, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=74531, PETRI_PLACES=731, PETRI_TRANSITIONS=2300} [2023-01-27 23:14:38,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 710 predicate places. [2023-01-27 23:14:38,402 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 2300 transitions, 74531 flow [2023-01-27 23:14:38,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 128.1875) internal successors, (2051), 16 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 23:14:38,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:38,402 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:38,407 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 23:14:38,604 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,SelfDestructingSolverStorable36 [2023-01-27 23:14:38,605 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:38,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash 894937826, now seen corresponding path program 31 times [2023-01-27 23:14:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822701864] [2023-01-27 23:14:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:14:38,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:38,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822701864] [2023-01-27 23:14:38,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822701864] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310550075] [2023-01-27 23:14:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:14:38,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:38,773 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 23:14:38,774 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 23:14:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:14:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:14:38,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:14:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310550075] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:39,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:39,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:14:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601088303] [2023-01-27 23:14:39,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:14:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:14:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:14:39,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:14:39,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 2300 transitions, 74531 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 23:14:39,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:39,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:14:39,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:49,562 INFO L130 PetriNetUnfolder]: 5527/11375 cut-off events. [2023-01-27 23:14:49,562 INFO L131 PetriNetUnfolder]: For 628627/628627 co-relation queries the response was YES. [2023-01-27 23:14:49,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151716 conditions, 11375 events. 5527/11375 cut-off events. For 628627/628627 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 103575 event pairs, 1642 based on Foata normal form. 38/11412 useless extension candidates. Maximal degree in co-relation 151345. Up to 7868 conditions per place. [2023-01-27 23:14:49,767 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 2014 selfloop transitions, 374 changer transitions 0/2388 dead transitions. [2023-01-27 23:14:49,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 2388 transitions, 81276 flow [2023-01-27 23:14:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:14:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:14:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3023 transitions. [2023-01-27 23:14:49,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982872200263505 [2023-01-27 23:14:49,769 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3023 transitions. [2023-01-27 23:14:49,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3023 transitions. [2023-01-27 23:14:49,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:49,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3023 transitions. [2023-01-27 23:14:49,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 131.43478260869566) internal successors, (3023), 23 states have internal predecessors, (3023), 0 states have call successors, (0), 0 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 23:14:49,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 23:14:49,776 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 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 23:14:49,776 INFO L175 Difference]: Start difference. First operand has 731 places, 2300 transitions, 74531 flow. Second operand 23 states and 3023 transitions. [2023-01-27 23:14:49,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 2388 transitions, 81276 flow [2023-01-27 23:15:02,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 2388 transitions, 80331 flow, removed 326 selfloop flow, removed 13 redundant places. [2023-01-27 23:15:02,893 INFO L231 Difference]: Finished difference. Result has 744 places, 2320 transitions, 75443 flow [2023-01-27 23:15:02,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=73436, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=75443, PETRI_PLACES=744, PETRI_TRANSITIONS=2320} [2023-01-27 23:15:02,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 723 predicate places. [2023-01-27 23:15:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 2320 transitions, 75443 flow [2023-01-27 23:15:02,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 23:15:02,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:02,895 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:02,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-27 23:15:03,103 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,SelfDestructingSolverStorable37 [2023-01-27 23:15:03,104 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:03,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1864351080, now seen corresponding path program 32 times [2023-01-27 23:15:03,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:03,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642456663] [2023-01-27 23:15:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:03,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642456663] [2023-01-27 23:15:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642456663] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911154190] [2023-01-27 23:15:03,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:15:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:03,238 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:03,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 23:15:03,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:15:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:03,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:03,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911154190] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:03,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:03,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:15:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281877537] [2023-01-27 23:15:03,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:15:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:15:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:15:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:15:03,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 2320 transitions, 75443 flow. Second operand has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:15:03,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:03,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:15:03,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:13,233 INFO L130 PetriNetUnfolder]: 5536/11402 cut-off events. [2023-01-27 23:15:13,234 INFO L131 PetriNetUnfolder]: For 648303/648303 co-relation queries the response was YES. [2023-01-27 23:15:13,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153432 conditions, 11402 events. 5536/11402 cut-off events. For 648303/648303 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 103909 event pairs, 1613 based on Foata normal form. 18/11419 useless extension candidates. Maximal degree in co-relation 152984. Up to 6739 conditions per place. [2023-01-27 23:15:13,441 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2052 selfloop transitions, 330 changer transitions 11/2393 dead transitions. [2023-01-27 23:15:13,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 2393 transitions, 82239 flow [2023-01-27 23:15:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:15:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:15:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2872 transitions. [2023-01-27 23:15:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3955922865013774 [2023-01-27 23:15:13,443 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2872 transitions. [2023-01-27 23:15:13,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2872 transitions. [2023-01-27 23:15:13,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:13,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2872 transitions. [2023-01-27 23:15:13,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 130.54545454545453) internal successors, (2872), 22 states have internal predecessors, (2872), 0 states have call successors, (0), 0 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 23:15:13,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 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 23:15:13,448 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 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 23:15:13,448 INFO L175 Difference]: Start difference. First operand has 744 places, 2320 transitions, 75443 flow. Second operand 22 states and 2872 transitions. [2023-01-27 23:15:13,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 2393 transitions, 82239 flow [2023-01-27 23:15:26,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 2393 transitions, 81388 flow, removed 366 selfloop flow, removed 9 redundant places. [2023-01-27 23:15:26,880 INFO L231 Difference]: Finished difference. Result has 762 places, 2324 transitions, 76285 flow [2023-01-27 23:15:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=74623, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=76285, PETRI_PLACES=762, PETRI_TRANSITIONS=2324} [2023-01-27 23:15:26,883 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 741 predicate places. [2023-01-27 23:15:26,883 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 2324 transitions, 76285 flow [2023-01-27 23:15:26,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.77777777777777) internal successors, (2300), 18 states have internal predecessors, (2300), 0 states have call successors, (0), 0 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 23:15:26,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:26,883 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:26,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 23:15:27,084 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:27,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2129046516, now seen corresponding path program 33 times [2023-01-27 23:15:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449900375] [2023-01-27 23:15:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:27,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:27,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449900375] [2023-01-27 23:15:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449900375] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:27,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436202947] [2023-01-27 23:15:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:15:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:27,236 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:27,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 23:15:27,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:15:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:15:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:27,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436202947] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:27,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:27,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 23:15:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284126717] [2023-01-27 23:15:27,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:15:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:15:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:15:27,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:15:27,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 2324 transitions, 76285 flow. Second operand has 17 states, 17 states have (on average 128.2941176470588) internal successors, (2181), 17 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 23:15:27,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:27,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:15:27,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:38,736 INFO L130 PetriNetUnfolder]: 5788/11907 cut-off events. [2023-01-27 23:15:38,736 INFO L131 PetriNetUnfolder]: For 727176/727176 co-relation queries the response was YES. [2023-01-27 23:15:38,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162920 conditions, 11907 events. 5788/11907 cut-off events. For 727176/727176 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 109211 event pairs, 1610 based on Foata normal form. 78/11984 useless extension candidates. Maximal degree in co-relation 162450. Up to 7654 conditions per place. [2023-01-27 23:15:38,964 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1977 selfloop transitions, 499 changer transitions 0/2476 dead transitions. [2023-01-27 23:15:38,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 2476 transitions, 85920 flow [2023-01-27 23:15:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:15:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:15:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3154 transitions. [2023-01-27 23:15:38,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982323232323232 [2023-01-27 23:15:38,967 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3154 transitions. [2023-01-27 23:15:38,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3154 transitions. [2023-01-27 23:15:38,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:38,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3154 transitions. [2023-01-27 23:15:38,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 131.41666666666666) internal successors, (3154), 24 states have internal predecessors, (3154), 0 states have call successors, (0), 0 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 23:15:38,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:15:38,975 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 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 23:15:38,975 INFO L175 Difference]: Start difference. First operand has 762 places, 2324 transitions, 76285 flow. Second operand 24 states and 3154 transitions. [2023-01-27 23:15:38,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 2476 transitions, 85920 flow [2023-01-27 23:15:53,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 2476 transitions, 85439 flow, removed 205 selfloop flow, removed 8 redundant places. [2023-01-27 23:15:53,555 INFO L231 Difference]: Finished difference. Result has 782 places, 2409 transitions, 81321 flow [2023-01-27 23:15:53,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=75487, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=81321, PETRI_PLACES=782, PETRI_TRANSITIONS=2409} [2023-01-27 23:15:53,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 761 predicate places. [2023-01-27 23:15:53,557 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 2409 transitions, 81321 flow [2023-01-27 23:15:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.2941176470588) internal successors, (2181), 17 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 23:15:53,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:53,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:53,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-27 23:15:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 23:15:53,763 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:53,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash -553355730, now seen corresponding path program 34 times [2023-01-27 23:15:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:53,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920415205] [2023-01-27 23:15:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:53,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:53,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920415205] [2023-01-27 23:15:53,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920415205] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:53,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407464744] [2023-01-27 23:15:53,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:15:53,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:53,903 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:53,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 23:15:54,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:15:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:15:54,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:54,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:15:54,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407464744] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:54,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:54,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-01-27 23:15:54,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467368642] [2023-01-27 23:15:54,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:54,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:15:54,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:15:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:15:54,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:15:54,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 2409 transitions, 81321 flow. Second operand has 18 states, 18 states have (on average 127.88888888888889) internal successors, (2302), 18 states have internal predecessors, (2302), 0 states have call successors, (0), 0 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 23:15:54,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:54,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:15:54,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:05,809 INFO L130 PetriNetUnfolder]: 5877/12124 cut-off events. [2023-01-27 23:16:05,809 INFO L131 PetriNetUnfolder]: For 840258/840258 co-relation queries the response was YES. [2023-01-27 23:16:05,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172372 conditions, 12124 events. 5877/12124 cut-off events. For 840258/840258 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 111711 event pairs, 1957 based on Foata normal form. 26/12149 useless extension candidates. Maximal degree in co-relation 171880. Up to 9629 conditions per place. [2023-01-27 23:16:06,042 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 2059 selfloop transitions, 439 changer transitions 4/2502 dead transitions. [2023-01-27 23:16:06,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 2502 transitions, 89588 flow [2023-01-27 23:16:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:16:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:16:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2107 transitions. [2023-01-27 23:16:06,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990530303030303 [2023-01-27 23:16:06,044 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2107 transitions. [2023-01-27 23:16:06,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2107 transitions. [2023-01-27 23:16:06,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:06,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2107 transitions. [2023-01-27 23:16:06,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 131.6875) internal successors, (2107), 16 states have internal predecessors, (2107), 0 states have call successors, (0), 0 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 23:16:06,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 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 23:16:06,047 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 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 23:16:06,048 INFO L175 Difference]: Start difference. First operand has 782 places, 2409 transitions, 81321 flow. Second operand 16 states and 2107 transitions. [2023-01-27 23:16:06,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 2502 transitions, 89588 flow [2023-01-27 23:16:22,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 2502 transitions, 87517 flow, removed 827 selfloop flow, removed 18 redundant places. [2023-01-27 23:16:22,342 INFO L231 Difference]: Finished difference. Result has 781 places, 2426 transitions, 81820 flow [2023-01-27 23:16:22,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=79240, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1980, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=81820, PETRI_PLACES=781, PETRI_TRANSITIONS=2426} [2023-01-27 23:16:22,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 760 predicate places. [2023-01-27 23:16:22,344 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 2426 transitions, 81820 flow [2023-01-27 23:16:22,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.88888888888889) internal successors, (2302), 18 states have internal predecessors, (2302), 0 states have call successors, (0), 0 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 23:16:22,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:22,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:22,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:22,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:22,545 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:22,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -88685944, now seen corresponding path program 35 times [2023-01-27 23:16:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203456705] [2023-01-27 23:16:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:16:22,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203456705] [2023-01-27 23:16:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203456705] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59537199] [2023-01-27 23:16:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:16:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:22,710 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:22,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 23:16:22,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 23:16:22,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:16:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:16:22,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:16:22,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59537199] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:22,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:22,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-27 23:16:22,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508992143] [2023-01-27 23:16:22,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:22,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:16:22,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:16:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:16:22,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-01-27 23:16:22,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 2426 transitions, 81820 flow. Second operand has 19 states, 19 states have (on average 128.05263157894737) internal successors, (2433), 19 states have internal predecessors, (2433), 0 states have call successors, (0), 0 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 23:16:22,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:22,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-01-27 23:16:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:35,042 INFO L130 PetriNetUnfolder]: 5953/12250 cut-off events. [2023-01-27 23:16:35,042 INFO L131 PetriNetUnfolder]: For 860732/860732 co-relation queries the response was YES. [2023-01-27 23:16:35,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173851 conditions, 12250 events. 5953/12250 cut-off events. For 860732/860732 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 112817 event pairs, 1625 based on Foata normal form. 20/12269 useless extension candidates. Maximal degree in co-relation 173364. Up to 7945 conditions per place. [2023-01-27 23:16:35,285 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1906 selfloop transitions, 642 changer transitions 1/2549 dead transitions. [2023-01-27 23:16:35,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2549 transitions, 90473 flow [2023-01-27 23:16:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:16:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:16:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3811 transitions. [2023-01-27 23:16:35,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982236154649948 [2023-01-27 23:16:35,288 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3811 transitions. [2023-01-27 23:16:35,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3811 transitions. [2023-01-27 23:16:35,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:35,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3811 transitions. [2023-01-27 23:16:35,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 131.41379310344828) internal successors, (3811), 29 states have internal predecessors, (3811), 0 states have call successors, (0), 0 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 23:16:35,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:16:35,295 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 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 23:16:35,295 INFO L175 Difference]: Start difference. First operand has 781 places, 2426 transitions, 81820 flow. Second operand 29 states and 3811 transitions. [2023-01-27 23:16:35,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2549 transitions, 90473 flow [2023-01-27 23:16:51,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 2549 transitions, 89769 flow, removed 157 selfloop flow, removed 15 redundant places. [2023-01-27 23:16:51,795 INFO L231 Difference]: Finished difference. Result has 799 places, 2469 transitions, 85286 flow [2023-01-27 23:16:51,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=80979, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=85286, PETRI_PLACES=799, PETRI_TRANSITIONS=2469} [2023-01-27 23:16:51,797 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 778 predicate places. [2023-01-27 23:16:51,797 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 2469 transitions, 85286 flow [2023-01-27 23:16:51,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 128.05263157894737) internal successors, (2433), 19 states have internal predecessors, (2433), 0 states have call successors, (0), 0 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 23:16:51,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:51,798 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:51,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-27 23:16:52,004 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:52,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash 267318248, now seen corresponding path program 36 times [2023-01-27 23:16:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:52,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845122314] [2023-01-27 23:16:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:52,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:16:52,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845122314] [2023-01-27 23:16:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845122314] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897590818] [2023-01-27 23:16:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:16:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:52,295 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:52,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 23:16:52,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:16:52,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:16:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:16:52,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:16:52,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:52,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:16:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:52,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:52,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:52,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-01-27 23:16:52,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:52,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-01-27 23:16:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:16:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897590818] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:52,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:52,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 18 [2023-01-27 23:16:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132201309] [2023-01-27 23:16:52,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:52,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:16:52,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:16:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=311, Unknown=1, NotChecked=0, Total=380 [2023-01-27 23:16:52,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 330 [2023-01-27 23:16:52,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 2469 transitions, 85286 flow. Second operand has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 23:16:52,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:52,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 330 [2023-01-27 23:16:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:04,023 INFO L130 PetriNetUnfolder]: 5912/12179 cut-off events. [2023-01-27 23:17:04,023 INFO L131 PetriNetUnfolder]: For 848977/849002 co-relation queries the response was YES. [2023-01-27 23:17:04,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175634 conditions, 12179 events. 5912/12179 cut-off events. For 848977/849002 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 112451 event pairs, 296 based on Foata normal form. 14/12174 useless extension candidates. Maximal degree in co-relation 175143. Up to 11449 conditions per place. [2023-01-27 23:17:04,283 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 2302 selfloop transitions, 166 changer transitions 22/2509 dead transitions. [2023-01-27 23:17:04,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 2509 transitions, 91075 flow [2023-01-27 23:17:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 23:17:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 23:17:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1204 transitions. [2023-01-27 23:17:04,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33168044077134984 [2023-01-27 23:17:04,285 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1204 transitions. [2023-01-27 23:17:04,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1204 transitions. [2023-01-27 23:17:04,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:17:04,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1204 transitions. [2023-01-27 23:17:04,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 109.45454545454545) internal successors, (1204), 11 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 23:17:04,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 23:17:04,288 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 23:17:04,288 INFO L175 Difference]: Start difference. First operand has 799 places, 2469 transitions, 85286 flow. Second operand 11 states and 1204 transitions. [2023-01-27 23:17:04,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 2509 transitions, 91075 flow [2023-01-27 23:17:20,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 2509 transitions, 89743 flow, removed 533 selfloop flow, removed 17 redundant places. [2023-01-27 23:17:20,750 INFO L231 Difference]: Finished difference. Result has 795 places, 2463 transitions, 84319 flow [2023-01-27 23:17:20,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=83954, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=84319, PETRI_PLACES=795, PETRI_TRANSITIONS=2463} [2023-01-27 23:17:20,752 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 774 predicate places. [2023-01-27 23:17:20,752 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 2463 transitions, 84319 flow [2023-01-27 23:17:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 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 23:17:20,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:17:20,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:17:20,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 23:17:20,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-27 23:17:20,959 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:17:20,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:17:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2140269437, now seen corresponding path program 37 times [2023-01-27 23:17:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:17:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448264090] [2023-01-27 23:17:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:17:20,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:17:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:17:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:17:22,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:17:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448264090] [2023-01-27 23:17:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448264090] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:17:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356268330] [2023-01-27 23:17:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:17:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:17:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:17:22,831 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:17:22,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 23:17:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:17:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 23:17:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:17:23,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:17:23,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:17:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:17:23,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:17:23,651 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:17:23,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:17:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:17:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356268330] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:17:24,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:17:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-01-27 23:17:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387579687] [2023-01-27 23:17:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:17:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 23:17:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:17:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 23:17:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-01-27 23:17:24,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:17:24,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 2463 transitions, 84319 flow. Second operand has 26 states, 26 states have (on average 98.8076923076923) internal successors, (2569), 26 states have internal predecessors, (2569), 0 states have call successors, (0), 0 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 23:17:24,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:17:24,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:17:24,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:43,549 INFO L130 PetriNetUnfolder]: 9552/19683 cut-off events. [2023-01-27 23:17:43,549 INFO L131 PetriNetUnfolder]: For 1611036/1611107 co-relation queries the response was YES. [2023-01-27 23:17:44,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297837 conditions, 19683 events. 9552/19683 cut-off events. For 1611036/1611107 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 193278 event pairs, 695 based on Foata normal form. 59/19720 useless extension candidates. Maximal degree in co-relation 297593. Up to 12318 conditions per place. [2023-01-27 23:17:44,143 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 2845 selfloop transitions, 849 changer transitions 117/3830 dead transitions. [2023-01-27 23:17:44,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 3830 transitions, 143684 flow [2023-01-27 23:17:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 23:17:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 23:17:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3219 transitions. [2023-01-27 23:17:44,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31466275659824045 [2023-01-27 23:17:44,145 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3219 transitions. [2023-01-27 23:17:44,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3219 transitions. [2023-01-27 23:17:44,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:17:44,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3219 transitions. [2023-01-27 23:17:44,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 103.83870967741936) internal successors, (3219), 31 states have internal predecessors, (3219), 0 states have call successors, (0), 0 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 23:17:44,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 330.0) internal successors, (10560), 32 states have internal predecessors, (10560), 0 states have call successors, (0), 0 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 23:17:44,151 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 330.0) internal successors, (10560), 32 states have internal predecessors, (10560), 0 states have call successors, (0), 0 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 23:17:44,152 INFO L175 Difference]: Start difference. First operand has 795 places, 2463 transitions, 84319 flow. Second operand 31 states and 3219 transitions. [2023-01-27 23:17:44,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 3830 transitions, 143684 flow [2023-01-27 23:18:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 808 places, 3830 transitions, 143028 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-01-27 23:18:16,147 INFO L231 Difference]: Finished difference. Result has 826 places, 3263 transitions, 119110 flow [2023-01-27 23:18:16,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=83733, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2043, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=119110, PETRI_PLACES=826, PETRI_TRANSITIONS=3263} [2023-01-27 23:18:16,150 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 805 predicate places. [2023-01-27 23:18:16,150 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 3263 transitions, 119110 flow [2023-01-27 23:18:16,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.8076923076923) internal successors, (2569), 26 states have internal predecessors, (2569), 0 states have call successors, (0), 0 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 23:18:16,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:18:16,150 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:18:16,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 23:18:16,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-27 23:18:16,356 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:18:16,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:18:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2030255191, now seen corresponding path program 38 times [2023-01-27 23:18:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:18:16,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487478606] [2023-01-27 23:18:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:18:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:18:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:18:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:18:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:18:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487478606] [2023-01-27 23:18:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487478606] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:18:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138234321] [2023-01-27 23:18:18,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:18:18,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:18:18,384 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:18:18,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 23:18:18,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:18:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:18:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 23:18:18,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:18:18,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:18:18,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:18:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:18:18,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:18:19,260 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:18:19,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:18:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138234321] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:18:20,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:18:20,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-01-27 23:18:20,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570441929] [2023-01-27 23:18:20,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:18:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 23:18:20,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:18:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 23:18:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-01-27 23:18:20,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:18:20,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 3263 transitions, 119110 flow. Second operand has 26 states, 26 states have (on average 98.96153846153847) internal successors, (2573), 26 states have internal predecessors, (2573), 0 states have call successors, (0), 0 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 23:18:20,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:18:20,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:18:20,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:18:50,011 INFO L130 PetriNetUnfolder]: 10487/22071 cut-off events. [2023-01-27 23:18:50,011 INFO L131 PetriNetUnfolder]: For 1907567/1907590 co-relation queries the response was YES. [2023-01-27 23:18:50,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342026 conditions, 22071 events. 10487/22071 cut-off events. For 1907567/1907590 co-relation queries the response was YES. Maximal size of possible extension queue 1463. Compared 225252 event pairs, 1043 based on Foata normal form. 24/22078 useless extension candidates. Maximal degree in co-relation 341765. Up to 18075 conditions per place. [2023-01-27 23:18:50,563 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 3308 selfloop transitions, 549 changer transitions 29/3905 dead transitions. [2023-01-27 23:18:50,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 3905 transitions, 149632 flow [2023-01-27 23:18:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 23:18:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 23:18:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3394 transitions. [2023-01-27 23:18:50,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116620752984389 [2023-01-27 23:18:50,568 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3394 transitions. [2023-01-27 23:18:50,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3394 transitions. [2023-01-27 23:18:50,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:18:50,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3394 transitions. [2023-01-27 23:18:50,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 102.84848484848484) internal successors, (3394), 33 states have internal predecessors, (3394), 0 states have call successors, (0), 0 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 23:18:50,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 330.0) internal successors, (11220), 34 states have internal predecessors, (11220), 0 states have call successors, (0), 0 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 23:18:50,578 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 330.0) internal successors, (11220), 34 states have internal predecessors, (11220), 0 states have call successors, (0), 0 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 23:18:50,578 INFO L175 Difference]: Start difference. First operand has 826 places, 3263 transitions, 119110 flow. Second operand 33 states and 3394 transitions. [2023-01-27 23:18:50,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 3905 transitions, 149632 flow [2023-01-27 23:19:33,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 3905 transitions, 144606 flow, removed 2451 selfloop flow, removed 12 redundant places. [2023-01-27 23:19:33,502 INFO L231 Difference]: Finished difference. Result has 856 places, 3579 transitions, 129301 flow [2023-01-27 23:19:33,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=114084, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=129301, PETRI_PLACES=856, PETRI_TRANSITIONS=3579} [2023-01-27 23:19:33,505 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 835 predicate places. [2023-01-27 23:19:33,505 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 3579 transitions, 129301 flow [2023-01-27 23:19:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.96153846153847) internal successors, (2573), 26 states have internal predecessors, (2573), 0 states have call successors, (0), 0 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 23:19:33,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:19:33,506 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:19:33,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-27 23:19:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:19:33,711 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:19:33,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:19:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1161297487, now seen corresponding path program 39 times [2023-01-27 23:19:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:19:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917928400] [2023-01-27 23:19:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:19:33,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:19:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:19:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:19:35,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:19:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917928400] [2023-01-27 23:19:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917928400] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:19:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165871337] [2023-01-27 23:19:35,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:19:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:19:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:19:35,440 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:19:35,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 23:19:35,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:19:35,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:19:35,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 23:19:35,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:19:36,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:19:36,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:19:36,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:19:36,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:19:36,467 INFO L321 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-01-27 23:19:36,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 48 [2023-01-27 23:19:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:19:36,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:19:37,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:19:37,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 912 treesize of output 417 [2023-01-27 23:19:37,852 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-01-27 23:19:37,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 1046 treesize of output 1153 [2023-01-27 23:19:38,458 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-01-27 23:19:38,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 838 treesize of output 838 [2023-01-27 23:19:39,108 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-01-27 23:19:39,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 337 treesize of output 493 [2023-01-27 23:22:33,851 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 23:22:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165871337] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:22:33,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:22:33,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 30 [2023-01-27 23:22:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643924769] [2023-01-27 23:22:33,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:22:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 23:22:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:22:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 23:22:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=811, Unknown=3, NotChecked=0, Total=992 [2023-01-27 23:22:33,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-01-27 23:22:33,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 3579 transitions, 129301 flow. Second operand has 32 states, 32 states have (on average 98.625) internal successors, (3156), 32 states have internal predecessors, (3156), 0 states have call successors, (0), 0 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 23:22:33,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:22:33,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-01-27 23:22:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-27 23:22:57,713 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:22:57,713 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 23:22:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:22:58,014 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:22:58,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-27 23:22:58,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:22:58,215 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 97/330 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 299975 conditions, 18689 events (10002/18688 cut-off events. For 1688880/1688903 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 185467 event pairs, 695 based on Foata normal form. 8/20421 useless extension candidates. Maximal degree in co-relation 299707. Up to 13452 conditions per place.). [2023-01-27 23:22:58,216 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:22:58,216 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:22:58,216 INFO L445 BasicCegarLoop]: Path program histogram: [39, 3, 2, 1, 1] [2023-01-27 23:22:58,219 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:22:58,219 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:22:58,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:22:58 BasicIcfg [2023-01-27 23:22:58,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:22:58,221 INFO L158 Benchmark]: Toolchain (without parser) took 800498.25ms. Allocated memory was 390.1MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 338.1MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 7.2GB. Max. memory is 16.0GB. [2023-01-27 23:22:58,221 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 390.1MB. Free memory is still 336.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:22:58,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.88ms. Allocated memory is still 390.1MB. Free memory was 338.1MB in the beginning and 326.6MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 23:22:58,222 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.86ms. Allocated memory is still 390.1MB. Free memory was 326.6MB in the beginning and 324.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:22:58,222 INFO L158 Benchmark]: Boogie Preprocessor took 33.53ms. Allocated memory is still 390.1MB. Free memory was 324.7MB in the beginning and 323.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:22:58,222 INFO L158 Benchmark]: RCFGBuilder took 481.52ms. Allocated memory is still 390.1MB. Free memory was 323.1MB in the beginning and 307.0MB in the end (delta: 16.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 23:22:58,222 INFO L158 Benchmark]: TraceAbstraction took 799620.86ms. Allocated memory was 390.1MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 306.3MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 7.2GB. Max. memory is 16.0GB. [2023-01-27 23:22:58,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 390.1MB. Free memory is still 336.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 299.88ms. Allocated memory is still 390.1MB. Free memory was 338.1MB in the beginning and 326.6MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.86ms. Allocated memory is still 390.1MB. Free memory was 326.6MB in the beginning and 324.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.53ms. Allocated memory is still 390.1MB. Free memory was 324.7MB in the beginning and 323.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 481.52ms. Allocated memory is still 390.1MB. Free memory was 323.1MB in the beginning and 307.0MB in the end (delta: 16.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 799620.86ms. Allocated memory was 390.1MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 306.3MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 7.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 140 PlacesBefore, 21 PlacesAfterwards, 147 TransitionsBefore, 17 TransitionsAfterwards, 1942 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 22 TrivialYvCompositions, 21 ConcurrentYvCompositions, 11 ChoiceCompositions, 173 TotalNumberOfCompositions, 1977 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1916, independent: 1906, independent conditional: 0, independent unconditional: 1906, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1166, independent: 1161, independent conditional: 0, independent unconditional: 1161, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1916, independent: 745, independent conditional: 0, independent unconditional: 745, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 1166, unknown conditional: 0, unknown unconditional: 1166] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 97/330 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 299975 conditions, 18689 events (10002/18688 cut-off events. For 1688880/1688903 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 185467 event pairs, 695 based on Foata normal form. 8/20421 useless extension candidates. Maximal degree in co-relation 299707. Up to 13452 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 97/330 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 299975 conditions, 18689 events (10002/18688 cut-off events. For 1688880/1688903 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 185467 event pairs, 695 based on Foata normal form. 8/20421 useless extension candidates. Maximal degree in co-relation 299707. Up to 13452 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 97/330 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 299975 conditions, 18689 events (10002/18688 cut-off events. For 1688880/1688903 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 185467 event pairs, 695 based on Foata normal form. 8/20421 useless extension candidates. Maximal degree in co-relation 299707. Up to 13452 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 192 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: 799.5s, OverallIterations: 46, TraceHistogramMax: 4, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 571.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 4985 SdHoareTripleChecker+Valid, 29.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4985 mSDsluCounter, 552 SdHoareTripleChecker+Invalid, 27.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 59 IncrementalHoareTripleChecker+Unchecked, 394 mSDsCounter, 973 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24272 IncrementalHoareTripleChecker+Invalid, 25333 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 973 mSolverCounterUnsat, 158 mSDtfsCounter, 24272 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3081 GetRequests, 1693 SyntacticMatches, 42 SemanticMatches, 1346 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11809 ImplicationChecksByTransitivity, 36.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129301occurred in iteration=45, InterpolantAutomatonStates: 999, 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: 0.5s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 207.8s InterpolantComputationTime, 1747 NumberOfCodeBlocks, 1737 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2445 ConstructedInterpolants, 17 QuantifiedInterpolants, 23274 SizeOfPredicates, 182 NumberOfNonLiveVariables, 8734 ConjunctsInSsa, 704 ConjunctsInUnsatCore, 129 InterpolantComputations, 6 PerfectInterpolantSequences, 524/1335 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