/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 12:08:06,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 12:08:06,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 12:08:06,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 12:08:06,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 12:08:06,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 12:08:06,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 12:08:06,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 12:08:06,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 12:08:06,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 12:08:06,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 12:08:06,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 12:08:06,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 12:08:06,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 12:08:06,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 12:08:06,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 12:08:06,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 12:08:06,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 12:08:06,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 12:08:06,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 12:08:06,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 12:08:06,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 12:08:06,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 12:08:06,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 12:08:06,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 12:08:06,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 12:08:06,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 12:08:06,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 12:08:06,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 12:08:06,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 12:08:06,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 12:08:06,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 12:08:06,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 12:08:06,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 12:08:06,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 12:08:06,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 12:08:06,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 12:08:06,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 12:08:06,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 12:08:06,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 12:08:06,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 12:08:06,409 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 [2023-01-28 12:08:06,438 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 12:08:06,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 12:08:06,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 12:08:06,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 12:08:06,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 12:08:06,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 12:08:06,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 12:08:06,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:08:06,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 12:08:06,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 12:08:06,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 12:08:06,442 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 12:08:06,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 12:08:06,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 12:08:06,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 12:08:06,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 12:08:06,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 12:08:06,650 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 12:08:06,650 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 12:08:06,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-01-28 12:08:07,645 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 12:08:07,853 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 12:08:07,853 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-01-28 12:08:07,857 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c629adf5c/ee90c535546b453fb0bcbabd7922bfa6/FLAGd52d5c9f9 [2023-01-28 12:08:07,869 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c629adf5c/ee90c535546b453fb0bcbabd7922bfa6 [2023-01-28 12:08:07,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 12:08:07,872 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 12:08:07,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 12:08:07,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 12:08:07,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 12:08:07,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:08:07" (1/1) ... [2023-01-28 12:08:07,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682f6dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:07, skipping insertion in model container [2023-01-28 12:08:07,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:08:07" (1/1) ... [2023-01-28 12:08:07,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 12:08:07,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 12:08:08,015 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-cond-2.wvr.c[2474,2487] [2023-01-28 12:08:08,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:08:08,032 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 12:08:08,044 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-cond-2.wvr.c[2474,2487] [2023-01-28 12:08:08,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:08:08,056 INFO L208 MainTranslator]: Completed translation [2023-01-28 12:08:08,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08 WrapperNode [2023-01-28 12:08:08,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 12:08:08,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 12:08:08,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 12:08:08,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 12:08:08,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,084 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-01-28 12:08:08,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 12:08:08,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 12:08:08,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 12:08:08,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 12:08:08,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 12:08:08,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 12:08:08,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 12:08:08,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 12:08:08,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (1/1) ... [2023-01-28 12:08:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:08:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:08,134 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) [2023-01-28 12:08:08,141 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 [2023-01-28 12:08:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 12:08:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 12:08:08,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 12:08:08,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 12:08:08,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 12:08:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 12:08:08,165 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 12:08:08,239 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 12:08:08,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 12:08:08,469 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 12:08:08,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 12:08:08,476 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 12:08:08,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:08:08 BoogieIcfgContainer [2023-01-28 12:08:08,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 12:08:08,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 12:08:08,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 12:08:08,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 12:08:08,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:08:07" (1/3) ... [2023-01-28 12:08:08,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f29a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:08:08, skipping insertion in model container [2023-01-28 12:08:08,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:08:08" (2/3) ... [2023-01-28 12:08:08,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f29a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:08:08, skipping insertion in model container [2023-01-28 12:08:08,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:08:08" (3/3) ... [2023-01-28 12:08:08,483 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-01-28 12:08:08,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 12:08:08,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 12:08:08,496 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 12:08:08,599 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 12:08:08,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 348 flow [2023-01-28 12:08:08,711 INFO L130 PetriNetUnfolder]: 15/164 cut-off events. [2023-01-28 12:08:08,712 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:08:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 15/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-01-28 12:08:08,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 166 transitions, 348 flow [2023-01-28 12:08:08,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 324 flow [2023-01-28 12:08:08,733 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 12:08:08,740 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 324 flow [2023-01-28 12:08:08,742 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 324 flow [2023-01-28 12:08:08,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 324 flow [2023-01-28 12:08:08,770 INFO L130 PetriNetUnfolder]: 15/156 cut-off events. [2023-01-28 12:08:08,771 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:08:08,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 15/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-01-28 12:08:08,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-01-28 12:08:13,944 INFO L134 LiptonReduction]: Checked pairs total: 2696 [2023-01-28 12:08:13,945 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-01-28 12:08:13,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 12:08:13,965 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;@13aeae0d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 12:08:13,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 12:08:13,997 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 12:08:13,997 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:08:13,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:13,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:13,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:14,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -526169532, now seen corresponding path program 1 times [2023-01-28 12:08:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161878516] [2023-01-28 12:08:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:14,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161878516] [2023-01-28 12:08:14,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161878516] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:14,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:14,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 12:08:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123836868] [2023-01-28 12:08:14,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:14,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 12:08:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 12:08:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 12:08:14,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 347 [2023-01-28 12:08:14,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:14,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 347 [2023-01-28 12:08:14,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:14,702 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-01-28 12:08:14,713 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 12:08:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-01-28 12:08:14,714 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-28 12:08:14,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-28 12:08:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 12:08:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 12:08:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-01-28 12:08:14,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169068203650336 [2023-01-28 12:08:14,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-01-28 12:08:14,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-01-28 12:08:14,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:14,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-01-28 12:08:14,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,748 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 434 transitions. [2023-01-28 12:08:14,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-28 12:08:14,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 12:08:14,774 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-28 12:08:14,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, 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} [2023-01-28 12:08:14,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 12:08:14,790 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-28 12:08:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:14,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 12:08:14,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:14,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1480683613, now seen corresponding path program 1 times [2023-01-28 12:08:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:14,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436352175] [2023-01-28 12:08:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436352175] [2023-01-28 12:08:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436352175] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:15,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:15,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559459586] [2023-01-28 12:08:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:15,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:15,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:15,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:15,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:15,308 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-01-28 12:08:15,308 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:08:15,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-01-28 12:08:15,309 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-01-28 12:08:15,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-01-28 12:08:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:08:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:08:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-01-28 12:08:15,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034582132564842 [2023-01-28 12:08:15,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-01-28 12:08:15,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-01-28 12:08:15,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:15,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-01-28 12:08:15,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,333 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 700 transitions. [2023-01-28 12:08:15,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-01-28 12:08:15,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 12:08:15,335 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-01-28 12:08:15,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-28 12:08:15,335 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-28 12:08:15,336 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-01-28 12:08:15,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:15,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:15,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 12:08:15,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:15,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash 182747709, now seen corresponding path program 2 times [2023-01-28 12:08:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:15,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867084975] [2023-01-28 12:08:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:15,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867084975] [2023-01-28 12:08:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867084975] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:15,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:15,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:15,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168084344] [2023-01-28 12:08:15,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:15,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:15,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:15,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:15,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:16,236 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-01-28 12:08:16,237 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-01-28 12:08:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 606 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-01-28 12:08:16,245 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-01-28 12:08:16,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-01-28 12:08:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:08:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:08:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 840 transitions. [2023-01-28 12:08:16,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034582132564842 [2023-01-28 12:08:16,248 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 840 transitions. [2023-01-28 12:08:16,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 840 transitions. [2023-01-28 12:08:16,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:16,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 840 transitions. [2023-01-28 12:08:16,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,269 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 840 transitions. [2023-01-28 12:08:16,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-01-28 12:08:16,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 12:08:16,272 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-01-28 12:08:16,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-01-28 12:08:16,273 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-01-28 12:08:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-01-28 12:08:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:16,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 12:08:16,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:16,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1504917559, now seen corresponding path program 3 times [2023-01-28 12:08:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:16,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142688470] [2023-01-28 12:08:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142688470] [2023-01-28 12:08:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142688470] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371145459] [2023-01-28 12:08:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:16,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:16,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:16,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:16,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:16,685 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-01-28 12:08:16,685 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-01-28 12:08:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-01-28 12:08:16,687 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-01-28 12:08:16,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-01-28 12:08:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:08:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:08:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-01-28 12:08:16,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040345821325648 [2023-01-28 12:08:16,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-01-28 12:08:16,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-01-28 12:08:16,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:16,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-01-28 12:08:16,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,705 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,705 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 701 transitions. [2023-01-28 12:08:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-01-28 12:08:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-01-28 12:08:16,714 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-01-28 12:08:16,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-28 12:08:16,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-01-28 12:08:16,730 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-01-28 12:08:16,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:16,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:16,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:16,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 12:08:16,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:16,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:16,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1764589935, now seen corresponding path program 4 times [2023-01-28 12:08:16,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:16,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140099305] [2023-01-28 12:08:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:16,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:17,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140099305] [2023-01-28 12:08:17,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140099305] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:17,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:17,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:17,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472183525] [2023-01-28 12:08:17,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:17,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:17,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:17,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:17,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:17,183 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-01-28 12:08:17,183 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-01-28 12:08:17,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-01-28 12:08:17,185 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-01-28 12:08:17,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-01-28 12:08:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:08:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:08:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-01-28 12:08:17,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057636887608067 [2023-01-28 12:08:17,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:17,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,198 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 695 transitions. [2023-01-28 12:08:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-01-28 12:08:17,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 12:08:17,201 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-01-28 12:08:17,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-01-28 12:08:17,215 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-01-28 12:08:17,215 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-01-28 12:08:17,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:17,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:17,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 12:08:17,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:17,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -467573743, now seen corresponding path program 5 times [2023-01-28 12:08:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953056174] [2023-01-28 12:08:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:17,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:17,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953056174] [2023-01-28 12:08:17,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953056174] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:17,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:17,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182944119] [2023-01-28 12:08:17,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:17,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:17,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:17,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:17,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:17,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:17,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:17,545 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-01-28 12:08:17,545 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-01-28 12:08:17,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-01-28 12:08:17,552 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-01-28 12:08:17,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-01-28 12:08:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:08:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:08:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2023-01-28 12:08:17,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028818443804035 [2023-01-28 12:08:17,554 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2023-01-28 12:08:17,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2023-01-28 12:08:17,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:17,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2023-01-28 12:08:17,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,566 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 699 transitions. [2023-01-28 12:08:17,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-01-28 12:08:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-28 12:08:17,585 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-01-28 12:08:17,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-01-28 12:08:17,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-01-28 12:08:17,587 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-01-28 12:08:17,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:17,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:17,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 12:08:17,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:17,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash -263674133, now seen corresponding path program 6 times [2023-01-28 12:08:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106344330] [2023-01-28 12:08:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:17,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106344330] [2023-01-28 12:08:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106344330] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:08:17,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:08:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:08:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674974337] [2023-01-28 12:08:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:08:17,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:08:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:08:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:08:17,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:17,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:17,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:17,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:17,933 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-01-28 12:08:17,933 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-01-28 12:08:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-01-28 12:08:17,934 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-01-28 12:08:17,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-01-28 12:08:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:08:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:08:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-01-28 12:08:17,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057636887608067 [2023-01-28 12:08:17,937 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:17,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-01-28 12:08:17,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,940 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,940 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 695 transitions. [2023-01-28 12:08:17,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-01-28 12:08:17,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 12:08:17,943 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-01-28 12:08:17,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-01-28 12:08:17,952 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-01-28 12:08:17,952 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-01-28 12:08:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:17,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:17,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 12:08:17,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:17,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1171572305, now seen corresponding path program 1 times [2023-01-28 12:08:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299686255] [2023-01-28 12:08:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299686255] [2023-01-28 12:08:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299686255] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755413730] [2023-01-28 12:08:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:18,277 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) [2023-01-28 12:08:18,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 12:08:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:18,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 12:08:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:18,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-01-28 12:08:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:18,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:18,923 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 12:08:18,923 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-01-28 12:08:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755413730] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:18,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:18,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-01-28 12:08:18,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151260367] [2023-01-28 12:08:18,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:18,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:18,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:18,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-28 12:08:18,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 12 states, 12 states have (on average 107.33333333333333) internal successors, (1288), 12 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:18,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:18,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-28 12:08:18,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:20,693 INFO L130 PetriNetUnfolder]: 236/417 cut-off events. [2023-01-28 12:08:20,693 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2023-01-28 12:08:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 417 events. 236/417 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 10 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1719. Up to 113 conditions per place. [2023-01-28 12:08:20,696 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 68 selfloop transitions, 53 changer transitions 4/125 dead transitions. [2023-01-28 12:08:20,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 995 flow [2023-01-28 12:08:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 12:08:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 12:08:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1467 transitions. [2023-01-28 12:08:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32520505431168256 [2023-01-28 12:08:20,699 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1467 transitions. [2023-01-28 12:08:20,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1467 transitions. [2023-01-28 12:08:20,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:20,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1467 transitions. [2023-01-28 12:08:20,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.84615384615384) internal successors, (1467), 13 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:20,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:20,708 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:20,708 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 13 states and 1467 transitions. [2023-01-28 12:08:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 995 flow [2023-01-28 12:08:20,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 933 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-01-28 12:08:20,713 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 676 flow [2023-01-28 12:08:20,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=676, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-01-28 12:08:20,714 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-01-28 12:08:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 676 flow [2023-01-28 12:08:20,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.33333333333333) internal successors, (1288), 12 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:20,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:20,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:20,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:20,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222474, now seen corresponding path program 1 times [2023-01-28 12:08:20,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:20,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950400805] [2023-01-28 12:08:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950400805] [2023-01-28 12:08:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950400805] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585106358] [2023-01-28 12:08:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:21,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:21,169 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) [2023-01-28 12:08:21,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 12:08:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 12:08:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:22,346 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-01-28 12:08:22,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 115 [2023-01-28 12:08:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:22,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:22,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:22,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 74 [2023-01-28 12:08:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:23,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585106358] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:23,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:23,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-01-28 12:08:23,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397995423] [2023-01-28 12:08:23,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:23,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 12:08:23,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 12:08:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-01-28 12:08:23,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 347 [2023-01-28 12:08:23,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 676 flow. Second operand has 21 states, 21 states have (on average 82.28571428571429) internal successors, (1728), 21 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:23,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:23,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 347 [2023-01-28 12:08:23,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:24,197 INFO L130 PetriNetUnfolder]: 375/684 cut-off events. [2023-01-28 12:08:24,198 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-01-28 12:08:24,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 684 events. 375/684 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3166 event pairs, 37 based on Foata normal form. 5/631 useless extension candidates. Maximal degree in co-relation 3069. Up to 232 conditions per place. [2023-01-28 12:08:24,202 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 76 selfloop transitions, 56 changer transitions 56/188 dead transitions. [2023-01-28 12:08:24,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1790 flow [2023-01-28 12:08:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 12:08:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 12:08:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1894 transitions. [2023-01-28 12:08:24,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24810060256746136 [2023-01-28 12:08:24,207 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1894 transitions. [2023-01-28 12:08:24,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1894 transitions. [2023-01-28 12:08:24,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:24,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1894 transitions. [2023-01-28 12:08:24,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.0909090909091) internal successors, (1894), 22 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:24,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:24,218 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:24,218 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 676 flow. Second operand 22 states and 1894 transitions. [2023-01-28 12:08:24,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1790 flow [2023-01-28 12:08:24,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 188 transitions, 1618 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-01-28 12:08:24,231 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 924 flow [2023-01-28 12:08:24,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=924, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-01-28 12:08:24,232 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-28 12:08:24,232 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 924 flow [2023-01-28 12:08:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.28571428571429) internal successors, (1728), 21 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:24,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:24,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:24,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-01-28 12:08:24,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:24,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -990791569, now seen corresponding path program 2 times [2023-01-28 12:08:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330121170] [2023-01-28 12:08:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:24,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:24,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330121170] [2023-01-28 12:08:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330121170] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257923795] [2023-01-28 12:08:24,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:08:24,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:24,711 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) [2023-01-28 12:08:24,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 12:08:24,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:24,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:24,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 12:08:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:24,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-01-28 12:08:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:24,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:25,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:25,180 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 53 [2023-01-28 12:08:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257923795] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:25,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-01-28 12:08:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637459058] [2023-01-28 12:08:25,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:25,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:25,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-28 12:08:25,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 107.5) internal successors, (1290), 12 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:25,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:25,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-28 12:08:25,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:25,686 INFO L130 PetriNetUnfolder]: 323/577 cut-off events. [2023-01-28 12:08:25,686 INFO L131 PetriNetUnfolder]: For 2303/2303 co-relation queries the response was YES. [2023-01-28 12:08:25,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 577 events. 323/577 cut-off events. For 2303/2303 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2495 event pairs, 5 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2679. Up to 239 conditions per place. [2023-01-28 12:08:25,690 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 69 selfloop transitions, 74 changer transitions 4/147 dead transitions. [2023-01-28 12:08:25,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1488 flow [2023-01-28 12:08:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 12:08:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 12:08:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1456 transitions. [2023-01-28 12:08:25,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227665706051873 [2023-01-28 12:08:25,693 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1456 transitions. [2023-01-28 12:08:25,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1456 transitions. [2023-01-28 12:08:25,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:25,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1456 transitions. [2023-01-28 12:08:25,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.0) internal successors, (1456), 13 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:25,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:25,700 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:25,700 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 924 flow. Second operand 13 states and 1456 transitions. [2023-01-28 12:08:25,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1488 flow [2023-01-28 12:08:25,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1364 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-01-28 12:08:25,711 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1211 flow [2023-01-28 12:08:25,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1211, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-01-28 12:08:25,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-28 12:08:25,712 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1211 flow [2023-01-28 12:08:25,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.5) internal successors, (1290), 12 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:25,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:25,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:25,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:25,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:25,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1059349345, now seen corresponding path program 3 times [2023-01-28 12:08:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283992025] [2023-01-28 12:08:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:26,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283992025] [2023-01-28 12:08:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283992025] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14918231] [2023-01-28 12:08:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:08:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:26,149 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) [2023-01-28 12:08:26,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 12:08:26,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:08:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 12:08:26,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:26,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 12:08:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:26,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:26,503 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 128 [2023-01-28 12:08:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:26,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14918231] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:26,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-01-28 12:08:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603568130] [2023-01-28 12:08:26,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:26,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 12:08:26,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:26,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 12:08:26,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-01-28 12:08:26,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-28 12:08:26,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1211 flow. Second operand has 14 states, 14 states have (on average 107.21428571428571) internal successors, (1501), 14 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:26,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:26,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-28 12:08:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:27,009 INFO L130 PetriNetUnfolder]: 389/752 cut-off events. [2023-01-28 12:08:27,009 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-01-28 12:08:27,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 752 events. 389/752 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3828 event pairs, 4 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3548. Up to 216 conditions per place. [2023-01-28 12:08:27,013 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 82 selfloop transitions, 102 changer transitions 20/204 dead transitions. [2023-01-28 12:08:27,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2264 flow [2023-01-28 12:08:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:08:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:08:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1895 transitions. [2023-01-28 12:08:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3212408882861502 [2023-01-28 12:08:27,017 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1895 transitions. [2023-01-28 12:08:27,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1895 transitions. [2023-01-28 12:08:27,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:27,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1895 transitions. [2023-01-28 12:08:27,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 111.47058823529412) internal successors, (1895), 17 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:27,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:27,036 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:27,036 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1211 flow. Second operand 17 states and 1895 transitions. [2023-01-28 12:08:27,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2264 flow [2023-01-28 12:08:27,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 204 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-28 12:08:27,055 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1713 flow [2023-01-28 12:08:27,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1713, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2023-01-28 12:08:27,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-01-28 12:08:27,055 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1713 flow [2023-01-28 12:08:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.21428571428571) internal successors, (1501), 14 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:27,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:27,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:27,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:27,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:27,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1724646899, now seen corresponding path program 4 times [2023-01-28 12:08:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510753321] [2023-01-28 12:08:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:27,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510753321] [2023-01-28 12:08:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510753321] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139043126] [2023-01-28 12:08:27,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:08:27,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:27,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:27,561 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) [2023-01-28 12:08:27,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 12:08:27,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:08:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 12:08:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:27,676 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 [2023-01-28 12:08:27,699 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 [2023-01-28 12:08:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:08:27,773 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 [2023-01-28 12:08:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-01-28 12:08:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:28,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:28,264 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 52 treesize of output 41 [2023-01-28 12:08:28,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:28,271 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 326 [2023-01-28 12:08:28,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-01-28 12:08:28,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:28,283 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-01-28 12:08:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:28,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139043126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:28,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:28,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-01-28 12:08:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529221554] [2023-01-28 12:08:28,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:28,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 12:08:28,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 12:08:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=336, Unknown=2, NotChecked=0, Total=420 [2023-01-28 12:08:28,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-01-28 12:08:28,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1713 flow. Second operand has 21 states, 21 states have (on average 94.66666666666667) internal successors, (1988), 21 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:28,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:28,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-01-28 12:08:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:30,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:08:31,378 INFO L130 PetriNetUnfolder]: 476/919 cut-off events. [2023-01-28 12:08:31,378 INFO L131 PetriNetUnfolder]: For 5228/5228 co-relation queries the response was YES. [2023-01-28 12:08:31,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 919 events. 476/919 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4923 event pairs, 11 based on Foata normal form. 4/922 useless extension candidates. Maximal degree in co-relation 4900. Up to 213 conditions per place. [2023-01-28 12:08:31,384 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 97 selfloop transitions, 139 changer transitions 10/246 dead transitions. [2023-01-28 12:08:31,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3021 flow [2023-01-28 12:08:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 12:08:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 12:08:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1797 transitions. [2023-01-28 12:08:31,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2877041306436119 [2023-01-28 12:08:31,388 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1797 transitions. [2023-01-28 12:08:31,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1797 transitions. [2023-01-28 12:08:31,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:31,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1797 transitions. [2023-01-28 12:08:31,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.83333333333333) internal successors, (1797), 18 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:31,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:31,396 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:31,396 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1713 flow. Second operand 18 states and 1797 transitions. [2023-01-28 12:08:31,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3021 flow [2023-01-28 12:08:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2776 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-01-28 12:08:31,423 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 2454 flow [2023-01-28 12:08:31,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2454, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2023-01-28 12:08:31,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-01-28 12:08:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 2454 flow [2023-01-28 12:08:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.66666666666667) internal successors, (1988), 21 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:31,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:31,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 12:08:31,631 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:31,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1294223865, now seen corresponding path program 5 times [2023-01-28 12:08:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236403746] [2023-01-28 12:08:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:31,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236403746] [2023-01-28 12:08:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236403746] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482299380] [2023-01-28 12:08:31,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:08:31,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:31,874 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) [2023-01-28 12:08:31,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 12:08:31,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 12:08:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:31,986 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 [2023-01-28 12:08:32,008 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 [2023-01-28 12:08:32,032 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 [2023-01-28 12:08:32,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-01-28 12:08:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:32,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:32,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:32,814 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 55 treesize of output 44 [2023-01-28 12:08:32,821 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 12:08:32,821 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 81 [2023-01-28 12:08:32,826 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 12:08:32,827 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2023-01-28 12:08:32,832 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 12:08:32,832 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-01-28 12:08:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482299380] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:32,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-01-28 12:08:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233853817] [2023-01-28 12:08:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:08:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:08:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=213, Unknown=5, NotChecked=0, Total=306 [2023-01-28 12:08:32,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-01-28 12:08:32,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 2454 flow. Second operand has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:32,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:32,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-01-28 12:08:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:33,659 INFO L130 PetriNetUnfolder]: 528/1033 cut-off events. [2023-01-28 12:08:33,662 INFO L131 PetriNetUnfolder]: For 7788/7788 co-relation queries the response was YES. [2023-01-28 12:08:33,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 1033 events. 528/1033 cut-off events. For 7788/7788 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5706 event pairs, 73 based on Foata normal form. 6/1038 useless extension candidates. Maximal degree in co-relation 5733. Up to 792 conditions per place. [2023-01-28 12:08:33,669 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 174 selfloop transitions, 55 changer transitions 11/240 dead transitions. [2023-01-28 12:08:33,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3429 flow [2023-01-28 12:08:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 12:08:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 12:08:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-01-28 12:08:33,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287223823246878 [2023-01-28 12:08:33,671 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-01-28 12:08:33,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-01-28 12:08:33,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:33,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-01-28 12:08:33,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:33,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:33,677 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:33,677 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 2454 flow. Second operand 12 states and 1196 transitions. [2023-01-28 12:08:33,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3429 flow [2023-01-28 12:08:33,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 3362 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-28 12:08:33,714 INFO L231 Difference]: Finished difference. Result has 126 places, 201 transitions, 2896 flow [2023-01-28 12:08:33,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2896, PETRI_PLACES=126, PETRI_TRANSITIONS=201} [2023-01-28 12:08:33,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-01-28 12:08:33,715 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 201 transitions, 2896 flow [2023-01-28 12:08:33,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:33,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:33,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:33,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:33,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:33,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -469526207, now seen corresponding path program 2 times [2023-01-28 12:08:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:33,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866303511] [2023-01-28 12:08:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:34,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866303511] [2023-01-28 12:08:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866303511] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129245746] [2023-01-28 12:08:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:08:34,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:34,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:34,143 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) [2023-01-28 12:08:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 12:08:34,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:34,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:34,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:34,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:34,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129245746] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:34,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:34,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 12:08:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77024107] [2023-01-28 12:08:34,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:34,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 12:08:34,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:34,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 12:08:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-28 12:08:34,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:34,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 201 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:34,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:34,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:34,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:35,204 INFO L130 PetriNetUnfolder]: 605/1185 cut-off events. [2023-01-28 12:08:35,205 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-01-28 12:08:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 1185 events. 605/1185 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6884 event pairs, 70 based on Foata normal form. 28/1212 useless extension candidates. Maximal degree in co-relation 6674. Up to 357 conditions per place. [2023-01-28 12:08:35,213 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-01-28 12:08:35,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 4219 flow [2023-01-28 12:08:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:08:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:08:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2357 transitions. [2023-01-28 12:08:35,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955924733005593 [2023-01-28 12:08:35,217 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2357 transitions. [2023-01-28 12:08:35,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2357 transitions. [2023-01-28 12:08:35,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:35,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2357 transitions. [2023-01-28 12:08:35,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 138.64705882352942) internal successors, (2357), 17 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:35,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:35,225 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:35,225 INFO L175 Difference]: Start difference. First operand has 126 places, 201 transitions, 2896 flow. Second operand 17 states and 2357 transitions. [2023-01-28 12:08:35,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 4219 flow [2023-01-28 12:08:35,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 302 transitions, 4167 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-01-28 12:08:35,272 INFO L231 Difference]: Finished difference. Result has 146 places, 235 transitions, 3664 flow [2023-01-28 12:08:35,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3664, PETRI_PLACES=146, PETRI_TRANSITIONS=235} [2023-01-28 12:08:35,273 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-01-28 12:08:35,273 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 235 transitions, 3664 flow [2023-01-28 12:08:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:35,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:35,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:35,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:35,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:35,480 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:35,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1106126361, now seen corresponding path program 3 times [2023-01-28 12:08:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:35,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961226758] [2023-01-28 12:08:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:35,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961226758] [2023-01-28 12:08:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961226758] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577618101] [2023-01-28 12:08:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:08:35,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:35,817 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) [2023-01-28 12:08:35,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 12:08:35,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:08:35,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:36,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577618101] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:36,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:36,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 12:08:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791902757] [2023-01-28 12:08:36,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:36,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:36,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:36,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 235 transitions, 3664 flow. Second operand has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:36,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:36,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:36,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:37,130 INFO L130 PetriNetUnfolder]: 700/1350 cut-off events. [2023-01-28 12:08:37,130 INFO L131 PetriNetUnfolder]: For 12122/12122 co-relation queries the response was YES. [2023-01-28 12:08:37,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1350 events. 700/1350 cut-off events. For 12122/12122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7922 event pairs, 124 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 8400. Up to 625 conditions per place. [2023-01-28 12:08:37,142 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 211 selfloop transitions, 115 changer transitions 1/327 dead transitions. [2023-01-28 12:08:37,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 327 transitions, 5104 flow [2023-01-28 12:08:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 12:08:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 12:08:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2094 transitions. [2023-01-28 12:08:37,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023054755043228 [2023-01-28 12:08:37,147 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2094 transitions. [2023-01-28 12:08:37,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2094 transitions. [2023-01-28 12:08:37,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:37,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2094 transitions. [2023-01-28 12:08:37,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 139.6) internal successors, (2094), 15 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,158 INFO L175 Difference]: Start difference. First operand has 146 places, 235 transitions, 3664 flow. Second operand 15 states and 2094 transitions. [2023-01-28 12:08:37,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 327 transitions, 5104 flow [2023-01-28 12:08:37,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 327 transitions, 4961 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-01-28 12:08:37,228 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 4366 flow [2023-01-28 12:08:37,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4366, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2023-01-28 12:08:37,229 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-01-28 12:08:37,229 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 4366 flow [2023-01-28 12:08:37,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:37,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:37,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:37,435 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,SelfDestructingSolverStorable14 [2023-01-28 12:08:37,435 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:37,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1138105375, now seen corresponding path program 4 times [2023-01-28 12:08:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112511561] [2023-01-28 12:08:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112511561] [2023-01-28 12:08:37,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112511561] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759062270] [2023-01-28 12:08:37,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:08:37,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:37,656 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) [2023-01-28 12:08:37,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 12:08:37,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:08:37,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:37,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759062270] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:37,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:37,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 12:08:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440200565] [2023-01-28 12:08:37,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:37,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:37,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:37,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:37,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 4366 flow. Second operand has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:37,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:37,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:39,206 INFO L130 PetriNetUnfolder]: 679/1327 cut-off events. [2023-01-28 12:08:39,206 INFO L131 PetriNetUnfolder]: For 14282/14282 co-relation queries the response was YES. [2023-01-28 12:08:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1327 events. 679/1327 cut-off events. For 14282/14282 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7894 event pairs, 120 based on Foata normal form. 28/1354 useless extension candidates. Maximal degree in co-relation 8784. Up to 629 conditions per place. [2023-01-28 12:08:39,238 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 214 selfloop transitions, 109 changer transitions 1/324 dead transitions. [2023-01-28 12:08:39,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 5258 flow [2023-01-28 12:08:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:08:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:08:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2360 transitions. [2023-01-28 12:08:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000678081030683 [2023-01-28 12:08:39,245 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2360 transitions. [2023-01-28 12:08:39,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2360 transitions. [2023-01-28 12:08:39,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:39,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2360 transitions. [2023-01-28 12:08:39,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 138.8235294117647) internal successors, (2360), 17 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:39,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:39,251 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:39,251 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 4366 flow. Second operand 17 states and 2360 transitions. [2023-01-28 12:08:39,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 5258 flow [2023-01-28 12:08:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 324 transitions, 5142 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-01-28 12:08:39,454 INFO L231 Difference]: Finished difference. Result has 177 places, 263 transitions, 4443 flow [2023-01-28 12:08:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4443, PETRI_PLACES=177, PETRI_TRANSITIONS=263} [2023-01-28 12:08:39,455 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-28 12:08:39,455 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 263 transitions, 4443 flow [2023-01-28 12:08:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:39,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:39,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:39,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 12:08:39,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:39,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636203, now seen corresponding path program 5 times [2023-01-28 12:08:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715370508] [2023-01-28 12:08:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715370508] [2023-01-28 12:08:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715370508] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963200850] [2023-01-28 12:08:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:08:39,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:39,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:39,881 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) [2023-01-28 12:08:39,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 12:08:40,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 12:08:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:40,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:40,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963200850] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:40,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:40,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 12:08:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381236285] [2023-01-28 12:08:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 12:08:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 12:08:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-01-28 12:08:40,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:40,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 263 transitions, 4443 flow. Second operand has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:40,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:40,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:40,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:40,758 INFO L130 PetriNetUnfolder]: 763/1475 cut-off events. [2023-01-28 12:08:40,758 INFO L131 PetriNetUnfolder]: For 15441/15441 co-relation queries the response was YES. [2023-01-28 12:08:40,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1475 events. 763/1475 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8873 event pairs, 102 based on Foata normal form. 12/1486 useless extension candidates. Maximal degree in co-relation 9914. Up to 714 conditions per place. [2023-01-28 12:08:40,784 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 189 selfloop transitions, 133 changer transitions 0/322 dead transitions. [2023-01-28 12:08:40,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 5667 flow [2023-01-28 12:08:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 12:08:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 12:08:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1522 transitions. [2023-01-28 12:08:40,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398742467906733 [2023-01-28 12:08:40,791 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1522 transitions. [2023-01-28 12:08:40,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1522 transitions. [2023-01-28 12:08:40,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:40,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1522 transitions. [2023-01-28 12:08:40,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 138.36363636363637) internal successors, (1522), 11 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:40,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:40,796 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:40,796 INFO L175 Difference]: Start difference. First operand has 177 places, 263 transitions, 4443 flow. Second operand 11 states and 1522 transitions. [2023-01-28 12:08:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 5667 flow [2023-01-28 12:08:40,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 322 transitions, 5553 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-01-28 12:08:40,902 INFO L231 Difference]: Finished difference. Result has 183 places, 284 transitions, 5098 flow [2023-01-28 12:08:40,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5098, PETRI_PLACES=183, PETRI_TRANSITIONS=284} [2023-01-28 12:08:40,903 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-01-28 12:08:40,903 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 284 transitions, 5098 flow [2023-01-28 12:08:40,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:40,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:40,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:40,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-28 12:08:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 12:08:41,112 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:41,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1697963331, now seen corresponding path program 6 times [2023-01-28 12:08:41,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857915562] [2023-01-28 12:08:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857915562] [2023-01-28 12:08:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857915562] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392243822] [2023-01-28 12:08:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:08:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:41,278 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) [2023-01-28 12:08:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 12:08:41,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 12:08:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:41,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392243822] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 12:08:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514965540] [2023-01-28 12:08:41,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:41,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 12:08:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 12:08:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 12:08:41,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:41,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 284 transitions, 5098 flow. Second operand has 13 states, 13 states have (on average 134.07692307692307) internal successors, (1743), 13 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:41,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:41,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:41,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:42,555 INFO L130 PetriNetUnfolder]: 1108/2170 cut-off events. [2023-01-28 12:08:42,555 INFO L131 PetriNetUnfolder]: For 28091/28091 co-relation queries the response was YES. [2023-01-28 12:08:42,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15541 conditions, 2170 events. 1108/2170 cut-off events. For 28091/28091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14201 event pairs, 45 based on Foata normal form. 16/2185 useless extension candidates. Maximal degree in co-relation 15275. Up to 545 conditions per place. [2023-01-28 12:08:42,570 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 248 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2023-01-28 12:08:42,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 493 transitions, 8920 flow [2023-01-28 12:08:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 12:08:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 12:08:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2650 transitions. [2023-01-28 12:08:42,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019414530562718 [2023-01-28 12:08:42,573 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2650 transitions. [2023-01-28 12:08:42,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2650 transitions. [2023-01-28 12:08:42,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:42,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2650 transitions. [2023-01-28 12:08:42,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.47368421052633) internal successors, (2650), 19 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:42,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:42,579 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:42,580 INFO L175 Difference]: Start difference. First operand has 183 places, 284 transitions, 5098 flow. Second operand 19 states and 2650 transitions. [2023-01-28 12:08:42,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 493 transitions, 8920 flow [2023-01-28 12:08:42,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 493 transitions, 8630 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-01-28 12:08:42,704 INFO L231 Difference]: Finished difference. Result has 206 places, 383 transitions, 7499 flow [2023-01-28 12:08:42,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7499, PETRI_PLACES=206, PETRI_TRANSITIONS=383} [2023-01-28 12:08:42,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-01-28 12:08:42,705 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 383 transitions, 7499 flow [2023-01-28 12:08:42,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 134.07692307692307) internal successors, (1743), 13 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:42,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:42,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:42,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 12:08:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 12:08:42,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:42,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 625542995, now seen corresponding path program 7 times [2023-01-28 12:08:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2282741] [2023-01-28 12:08:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:43,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2282741] [2023-01-28 12:08:43,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2282741] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429096672] [2023-01-28 12:08:43,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:08:43,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:43,067 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) [2023-01-28 12:08:43,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 12:08:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:43,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429096672] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:43,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 12:08:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342144182] [2023-01-28 12:08:43,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 12:08:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 12:08:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-01-28 12:08:43,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:43,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 383 transitions, 7499 flow. Second operand has 13 states, 13 states have (on average 134.23076923076923) internal successors, (1745), 13 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:43,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:43,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:43,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:44,315 INFO L130 PetriNetUnfolder]: 1126/2204 cut-off events. [2023-01-28 12:08:44,315 INFO L131 PetriNetUnfolder]: For 36261/36261 co-relation queries the response was YES. [2023-01-28 12:08:44,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2204 events. 1126/2204 cut-off events. For 36261/36261 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14381 event pairs, 55 based on Foata normal form. 12/2215 useless extension candidates. Maximal degree in co-relation 16860. Up to 597 conditions per place. [2023-01-28 12:08:44,331 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 225 selfloop transitions, 248 changer transitions 0/473 dead transitions. [2023-01-28 12:08:44,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9358 flow [2023-01-28 12:08:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 12:08:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 12:08:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2626 transitions. [2023-01-28 12:08:44,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39830122857576217 [2023-01-28 12:08:44,334 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2626 transitions. [2023-01-28 12:08:44,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2626 transitions. [2023-01-28 12:08:44,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:44,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2626 transitions. [2023-01-28 12:08:44,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.21052631578948) internal successors, (2626), 19 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:44,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:44,340 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:44,340 INFO L175 Difference]: Start difference. First operand has 206 places, 383 transitions, 7499 flow. Second operand 19 states and 2626 transitions. [2023-01-28 12:08:44,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9358 flow [2023-01-28 12:08:44,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9004 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-01-28 12:08:44,499 INFO L231 Difference]: Finished difference. Result has 226 places, 392 transitions, 8009 flow [2023-01-28 12:08:44,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7103, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8009, PETRI_PLACES=226, PETRI_TRANSITIONS=392} [2023-01-28 12:08:44,499 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-01-28 12:08:44,500 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 392 transitions, 8009 flow [2023-01-28 12:08:44,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 134.23076923076923) internal successors, (1745), 13 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:44,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:44,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:44,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:44,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:44,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:44,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1892416347, now seen corresponding path program 8 times [2023-01-28 12:08:44,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:44,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871559618] [2023-01-28 12:08:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871559618] [2023-01-28 12:08:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871559618] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14518507] [2023-01-28 12:08:44,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:08:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:44,881 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) [2023-01-28 12:08:44,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 12:08:44,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:44,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:45,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14518507] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:45,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 12:08:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848978514] [2023-01-28 12:08:45,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:45,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 392 transitions, 8009 flow. Second operand has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:45,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:45,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:46,139 INFO L130 PetriNetUnfolder]: 1189/2331 cut-off events. [2023-01-28 12:08:46,139 INFO L131 PetriNetUnfolder]: For 42784/42784 co-relation queries the response was YES. [2023-01-28 12:08:46,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18687 conditions, 2331 events. 1189/2331 cut-off events. For 42784/42784 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15406 event pairs, 216 based on Foata normal form. 24/2354 useless extension candidates. Maximal degree in co-relation 18376. Up to 1366 conditions per place. [2023-01-28 12:08:46,156 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 296 selfloop transitions, 186 changer transitions 2/484 dead transitions. [2023-01-28 12:08:46,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 10028 flow [2023-01-28 12:08:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 12:08:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 12:08:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2218 transitions. [2023-01-28 12:08:46,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994956772334294 [2023-01-28 12:08:46,158 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2218 transitions. [2023-01-28 12:08:46,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2218 transitions. [2023-01-28 12:08:46,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:46,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2218 transitions. [2023-01-28 12:08:46,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 138.625) internal successors, (2218), 16 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:46,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:46,163 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:46,163 INFO L175 Difference]: Start difference. First operand has 226 places, 392 transitions, 8009 flow. Second operand 16 states and 2218 transitions. [2023-01-28 12:08:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 10028 flow [2023-01-28 12:08:46,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9795 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-01-28 12:08:46,330 INFO L231 Difference]: Finished difference. Result has 238 places, 421 transitions, 9012 flow [2023-01-28 12:08:46,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9012, PETRI_PLACES=238, PETRI_TRANSITIONS=421} [2023-01-28 12:08:46,331 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-01-28 12:08:46,331 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 421 transitions, 9012 flow [2023-01-28 12:08:46,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:46,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:46,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:46,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 12:08:46,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-01-28 12:08:46,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:46,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 158319213, now seen corresponding path program 9 times [2023-01-28 12:08:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:46,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92519023] [2023-01-28 12:08:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:46,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92519023] [2023-01-28 12:08:46,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92519023] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31100144] [2023-01-28 12:08:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:08:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:46,685 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) [2023-01-28 12:08:46,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 12:08:46,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:08:46,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:46,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:46,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31100144] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:47,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:47,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 12:08:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791592675] [2023-01-28 12:08:47,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:47,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 12:08:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 12:08:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-28 12:08:47,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:47,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 421 transitions, 9012 flow. Second operand has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:47,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:47,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:47,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:47,913 INFO L130 PetriNetUnfolder]: 1196/2314 cut-off events. [2023-01-28 12:08:47,914 INFO L131 PetriNetUnfolder]: For 46147/46147 co-relation queries the response was YES. [2023-01-28 12:08:47,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 2314 events. 1196/2314 cut-off events. For 46147/46147 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15011 event pairs, 216 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 19267. Up to 1376 conditions per place. [2023-01-28 12:08:47,974 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 291 selfloop transitions, 185 changer transitions 2/478 dead transitions. [2023-01-28 12:08:47,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 478 transitions, 10462 flow [2023-01-28 12:08:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 12:08:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 12:08:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1944 transitions. [2023-01-28 12:08:47,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40016467682173734 [2023-01-28 12:08:47,993 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1944 transitions. [2023-01-28 12:08:47,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1944 transitions. [2023-01-28 12:08:47,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:47,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1944 transitions. [2023-01-28 12:08:47,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 138.85714285714286) internal successors, (1944), 14 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:48,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:48,001 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:48,001 INFO L175 Difference]: Start difference. First operand has 238 places, 421 transitions, 9012 flow. Second operand 14 states and 1944 transitions. [2023-01-28 12:08:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 478 transitions, 10462 flow [2023-01-28 12:08:48,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 478 transitions, 10314 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-01-28 12:08:48,308 INFO L231 Difference]: Finished difference. Result has 246 places, 427 transitions, 9432 flow [2023-01-28 12:08:48,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9432, PETRI_PLACES=246, PETRI_TRANSITIONS=427} [2023-01-28 12:08:48,308 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-01-28 12:08:48,308 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 427 transitions, 9432 flow [2023-01-28 12:08:48,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:48,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:48,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:48,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:48,514 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:48,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -789546511, now seen corresponding path program 10 times [2023-01-28 12:08:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197797310] [2023-01-28 12:08:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197797310] [2023-01-28 12:08:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197797310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675787684] [2023-01-28 12:08:48,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:08:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:48,690 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) [2023-01-28 12:08:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 12:08:48,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:08:48,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 12:08:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:48,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:49,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675787684] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:49,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 12:08:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628384907] [2023-01-28 12:08:49,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 12:08:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 12:08:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 12:08:49,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:49,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 427 transitions, 9432 flow. Second operand has 13 states, 13 states have (on average 133.92307692307693) internal successors, (1741), 13 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:49,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:49,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:49,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:50,541 INFO L130 PetriNetUnfolder]: 1350/2640 cut-off events. [2023-01-28 12:08:50,541 INFO L131 PetriNetUnfolder]: For 54961/54961 co-relation queries the response was YES. [2023-01-28 12:08:50,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2640 events. 1350/2640 cut-off events. For 54961/54961 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17644 event pairs, 35 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 22569. Up to 647 conditions per place. [2023-01-28 12:08:50,565 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 309 selfloop transitions, 253 changer transitions 0/562 dead transitions. [2023-01-28 12:08:50,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 562 transitions, 12551 flow [2023-01-28 12:08:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 12:08:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 12:08:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2505 transitions. [2023-01-28 12:08:50,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010566762728146 [2023-01-28 12:08:50,567 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2505 transitions. [2023-01-28 12:08:50,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2505 transitions. [2023-01-28 12:08:50,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:50,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2505 transitions. [2023-01-28 12:08:50,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:50,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:50,573 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:50,573 INFO L175 Difference]: Start difference. First operand has 246 places, 427 transitions, 9432 flow. Second operand 18 states and 2505 transitions. [2023-01-28 12:08:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 562 transitions, 12551 flow [2023-01-28 12:08:50,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 562 transitions, 12203 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-28 12:08:50,859 INFO L231 Difference]: Finished difference. Result has 253 places, 444 transitions, 10131 flow [2023-01-28 12:08:50,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10131, PETRI_PLACES=253, PETRI_TRANSITIONS=444} [2023-01-28 12:08:50,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-01-28 12:08:50,859 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 444 transitions, 10131 flow [2023-01-28 12:08:50,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 133.92307692307693) internal successors, (1741), 13 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:50,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:50,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:50,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:51,078 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:51,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:51,079 INFO L85 PathProgramCache]: Analyzing trace with hash -212875034, now seen corresponding path program 1 times [2023-01-28 12:08:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471772184] [2023-01-28 12:08:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:51,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471772184] [2023-01-28 12:08:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471772184] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487940211] [2023-01-28 12:08:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:51,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:51,261 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) [2023-01-28 12:08:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 12:08:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 12:08:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:51,443 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 [2023-01-28 12:08:51,481 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 [2023-01-28 12:08:51,508 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 [2023-01-28 12:08:51,805 INFO L321 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2023-01-28 12:08:51,806 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 206 treesize of output 151 [2023-01-28 12:08:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:51,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:52,277 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* 4 .cse0) c_~f~0.offset))) (<= c_~size~0 .cse0))))) is different from false [2023-01-28 12:08:52,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:52,333 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 140 treesize of output 92 [2023-01-28 12:08:52,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:52,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 254 treesize of output 254 [2023-01-28 12:08:52,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:52,371 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 214 treesize of output 194 [2023-01-28 12:08:52,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:52,397 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 91 treesize of output 101 [2023-01-28 12:08:52,762 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 12:08:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487940211] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:52,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-01-28 12:08:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611795360] [2023-01-28 12:08:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:08:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:08:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-01-28 12:08:52,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-01-28 12:08:52,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 444 transitions, 10131 flow. Second operand has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:52,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:52,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-01-28 12:08:52,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:54,539 INFO L130 PetriNetUnfolder]: 1673/3401 cut-off events. [2023-01-28 12:08:54,539 INFO L131 PetriNetUnfolder]: For 83073/83073 co-relation queries the response was YES. [2023-01-28 12:08:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28798 conditions, 3401 events. 1673/3401 cut-off events. For 83073/83073 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24940 event pairs, 172 based on Foata normal form. 148/3548 useless extension candidates. Maximal degree in co-relation 28642. Up to 1386 conditions per place. [2023-01-28 12:08:54,568 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 395 selfloop transitions, 133 changer transitions 161/689 dead transitions. [2023-01-28 12:08:54,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 15671 flow [2023-01-28 12:08:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:08:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:08:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1836 transitions. [2023-01-28 12:08:54,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23004636010524998 [2023-01-28 12:08:54,570 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1836 transitions. [2023-01-28 12:08:54,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1836 transitions. [2023-01-28 12:08:54,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:54,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1836 transitions. [2023-01-28 12:08:54,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.82608695652173) internal successors, (1836), 23 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:54,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:54,576 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:54,576 INFO L175 Difference]: Start difference. First operand has 253 places, 444 transitions, 10131 flow. Second operand 23 states and 1836 transitions. [2023-01-28 12:08:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 15671 flow [2023-01-28 12:08:54,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 14983 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-01-28 12:08:54,977 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 9940 flow [2023-01-28 12:08:54,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9940, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2023-01-28 12:08:54,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-01-28 12:08:54,985 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 9940 flow [2023-01-28 12:08:54,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:54,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:54,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:54,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 12:08:55,191 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:55,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1127277119, now seen corresponding path program 6 times [2023-01-28 12:08:55,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:55,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444765771] [2023-01-28 12:08:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:08:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444765771] [2023-01-28 12:08:55,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444765771] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390441651] [2023-01-28 12:08:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:08:55,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:55,315 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) [2023-01-28 12:08:55,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 12:08:55,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 12:08:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 12:08:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:08:55,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:55,606 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 12:08:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:55,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:55,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:08:55,850 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 128 [2023-01-28 12:08:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:08:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390441651] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:56,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-01-28 12:08:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824799147] [2023-01-28 12:08:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:56,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 12:08:56,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 12:08:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-01-28 12:08:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:08:56,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 9940 flow. Second operand has 21 states, 21 states have (on average 94.19047619047619) internal successors, (1978), 21 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:56,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:56,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:08:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:57,388 INFO L130 PetriNetUnfolder]: 1622/3315 cut-off events. [2023-01-28 12:08:57,388 INFO L131 PetriNetUnfolder]: For 73385/73385 co-relation queries the response was YES. [2023-01-28 12:08:57,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 3315 events. 1622/3315 cut-off events. For 73385/73385 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24234 event pairs, 87 based on Foata normal form. 53/3367 useless extension candidates. Maximal degree in co-relation 28683. Up to 1119 conditions per place. [2023-01-28 12:08:57,412 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 393 selfloop transitions, 107 changer transitions 166/666 dead transitions. [2023-01-28 12:08:57,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 666 transitions, 15425 flow [2023-01-28 12:08:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 12:08:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 12:08:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2716 transitions. [2023-01-28 12:08:57,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27953890489913547 [2023-01-28 12:08:57,430 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2716 transitions. [2023-01-28 12:08:57,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2716 transitions. [2023-01-28 12:08:57,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:57,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2716 transitions. [2023-01-28 12:08:57,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.0) internal successors, (2716), 28 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:57,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:57,452 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:57,452 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 9940 flow. Second operand 28 states and 2716 transitions. [2023-01-28 12:08:57,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 666 transitions, 15425 flow [2023-01-28 12:08:57,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 666 transitions, 15053 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-01-28 12:08:57,846 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 8984 flow [2023-01-28 12:08:57,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8984, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2023-01-28 12:08:57,847 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-01-28 12:08:57,847 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 8984 flow [2023-01-28 12:08:57,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.19047619047619) internal successors, (1978), 21 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:57,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:57,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:57,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:58,052 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:58,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 289751092, now seen corresponding path program 11 times [2023-01-28 12:08:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:58,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137680391] [2023-01-28 12:08:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137680391] [2023-01-28 12:08:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137680391] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053900524] [2023-01-28 12:08:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:08:58,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:58,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:58,210 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) [2023-01-28 12:08:58,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 12:08:58,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:08:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 12:08:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053900524] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:58,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 12:08:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449682540] [2023-01-28 12:08:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:58,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 12:08:58,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 12:08:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-01-28 12:08:58,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:08:58,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 8984 flow. Second operand has 14 states, 14 states have (on average 134.14285714285714) internal successors, (1878), 14 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:58,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:58,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:08:58,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:59,841 INFO L130 PetriNetUnfolder]: 1235/2475 cut-off events. [2023-01-28 12:08:59,841 INFO L131 PetriNetUnfolder]: For 53898/53898 co-relation queries the response was YES. [2023-01-28 12:08:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 2475 events. 1235/2475 cut-off events. For 53898/53898 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16526 event pairs, 183 based on Foata normal form. 16/2490 useless extension candidates. Maximal degree in co-relation 21220. Up to 927 conditions per place. [2023-01-28 12:08:59,862 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 267 selfloop transitions, 195 changer transitions 1/463 dead transitions. [2023-01-28 12:08:59,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 463 transitions, 10351 flow [2023-01-28 12:08:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 12:08:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 12:08:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2477 transitions. [2023-01-28 12:08:59,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39657380723663144 [2023-01-28 12:08:59,864 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2477 transitions. [2023-01-28 12:08:59,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2477 transitions. [2023-01-28 12:08:59,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:59,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2477 transitions. [2023-01-28 12:08:59,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:59,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:59,870 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:59,870 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 8984 flow. Second operand 18 states and 2477 transitions. [2023-01-28 12:08:59,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 463 transitions, 10351 flow [2023-01-28 12:09:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 463 transitions, 9611 flow, removed 125 selfloop flow, removed 23 redundant places. [2023-01-28 12:09:00,106 INFO L231 Difference]: Finished difference. Result has 265 places, 405 transitions, 8805 flow [2023-01-28 12:09:00,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8805, PETRI_PLACES=265, PETRI_TRANSITIONS=405} [2023-01-28 12:09:00,106 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-28 12:09:00,106 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 405 transitions, 8805 flow [2023-01-28 12:09:00,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 134.14285714285714) internal successors, (1878), 14 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:00,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:00,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:00,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:00,312 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:00,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1623000778, now seen corresponding path program 2 times [2023-01-28 12:09:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532024468] [2023-01-28 12:09:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:00,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532024468] [2023-01-28 12:09:00,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532024468] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:00,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739755040] [2023-01-28 12:09:00,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:09:00,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:00,958 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) [2023-01-28 12:09:00,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 12:09:01,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:09:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 12:09:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:01,094 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 15 treesize of output 11 [2023-01-28 12:09:01,139 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 [2023-01-28 12:09:01,221 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 [2023-01-28 12:09:01,599 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-01-28 12:09:01,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 35 [2023-01-28 12:09:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:04,736 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (~x2~0 Int) (v_ArrVal_729 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_729) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (= (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* .cse0 4)))) (< .cse0 0))))) is different from false [2023-01-28 12:09:04,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:04,903 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 140 treesize of output 92 [2023-01-28 12:09:04,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:04,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 540 treesize of output 500 [2023-01-28 12:09:04,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:04,966 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 109 treesize of output 116 [2023-01-28 12:09:04,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:04,989 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 151 treesize of output 113 [2023-01-28 12:09:05,487 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 12:09:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739755040] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:05,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 12:09:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899284779] [2023-01-28 12:09:05,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:09:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:09:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=835, Unknown=2, NotChecked=60, Total=1056 [2023-01-28 12:09:05,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-01-28 12:09:05,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 405 transitions, 8805 flow. Second operand has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:05,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:05,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-01-28 12:09:05,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:12,317 INFO L130 PetriNetUnfolder]: 1541/3100 cut-off events. [2023-01-28 12:09:12,317 INFO L131 PetriNetUnfolder]: For 57246/57246 co-relation queries the response was YES. [2023-01-28 12:09:12,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3100 events. 1541/3100 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21833 event pairs, 129 based on Foata normal form. 39/3138 useless extension candidates. Maximal degree in co-relation 24967. Up to 1819 conditions per place. [2023-01-28 12:09:12,338 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 430 selfloop transitions, 101 changer transitions 111/642 dead transitions. [2023-01-28 12:09:12,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 642 transitions, 13257 flow [2023-01-28 12:09:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 12:09:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 12:09:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2525 transitions. [2023-01-28 12:09:12,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2273955331412104 [2023-01-28 12:09:12,342 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2525 transitions. [2023-01-28 12:09:12,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2525 transitions. [2023-01-28 12:09:12,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:12,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2525 transitions. [2023-01-28 12:09:12,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.90625) internal successors, (2525), 32 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:12,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:12,370 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:12,370 INFO L175 Difference]: Start difference. First operand has 265 places, 405 transitions, 8805 flow. Second operand 32 states and 2525 transitions. [2023-01-28 12:09:12,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 642 transitions, 13257 flow [2023-01-28 12:09:12,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 642 transitions, 12846 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-01-28 12:09:12,623 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 9681 flow [2023-01-28 12:09:12,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9681, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2023-01-28 12:09:12,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-28 12:09:12,624 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 9681 flow [2023-01-28 12:09:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:12,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:12,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:12,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:12,829 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:12,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1456848755, now seen corresponding path program 7 times [2023-01-28 12:09:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795487375] [2023-01-28 12:09:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:09:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795487375] [2023-01-28 12:09:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795487375] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183282786] [2023-01-28 12:09:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:09:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:13,081 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) [2023-01-28 12:09:13,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 12:09:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 12:09:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:13,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:09:13,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:13,392 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 12:09:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:13,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:13,593 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 56 [2023-01-28 12:09:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:13,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183282786] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:13,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:13,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-01-28 12:09:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692840687] [2023-01-28 12:09:13,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 12:09:13,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 12:09:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-01-28 12:09:13,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:09:13,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 9681 flow. Second operand has 24 states, 24 states have (on average 94.125) internal successors, (2259), 24 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:13,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:13,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:09:13,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:15,949 INFO L130 PetriNetUnfolder]: 1470/2904 cut-off events. [2023-01-28 12:09:15,949 INFO L131 PetriNetUnfolder]: For 59240/59240 co-relation queries the response was YES. [2023-01-28 12:09:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24732 conditions, 2904 events. 1470/2904 cut-off events. For 59240/59240 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19671 event pairs, 138 based on Foata normal form. 19/2922 useless extension candidates. Maximal degree in co-relation 24555. Up to 2072 conditions per place. [2023-01-28 12:09:15,974 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 407 selfloop transitions, 112 changer transitions 71/590 dead transitions. [2023-01-28 12:09:15,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 590 transitions, 12513 flow [2023-01-28 12:09:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 12:09:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 12:09:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3121 transitions. [2023-01-28 12:09:15,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810698847262248 [2023-01-28 12:09:15,977 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3121 transitions. [2023-01-28 12:09:15,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3121 transitions. [2023-01-28 12:09:15,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:15,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3121 transitions. [2023-01-28 12:09:15,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 97.53125) internal successors, (3121), 32 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:15,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:15,985 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:15,985 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 9681 flow. Second operand 32 states and 3121 transitions. [2023-01-28 12:09:15,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 590 transitions, 12513 flow [2023-01-28 12:09:16,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 590 transitions, 12163 flow, removed 155 selfloop flow, removed 16 redundant places. [2023-01-28 12:09:16,263 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 9876 flow [2023-01-28 12:09:16,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9876, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2023-01-28 12:09:16,263 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2023-01-28 12:09:16,263 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 9876 flow [2023-01-28 12:09:16,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.125) internal successors, (2259), 24 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:16,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:16,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:16,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:16,469 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,SelfDestructingSolverStorable26 [2023-01-28 12:09:16,469 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:16,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1057721665, now seen corresponding path program 3 times [2023-01-28 12:09:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040708235] [2023-01-28 12:09:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040708235] [2023-01-28 12:09:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040708235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76072223] [2023-01-28 12:09:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:09:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:17,484 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) [2023-01-28 12:09:17,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 12:09:17,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:09:17,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:17,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:09:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:17,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:17,927 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 [2023-01-28 12:09:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:09:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:18,596 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:18,596 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 [2023-01-28 12:09:18,683 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:18,683 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:18,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76072223] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:18,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:09:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781513852] [2023-01-28 12:09:18,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:09:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:09:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:09:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:09:18,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 9876 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:18,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:18,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:09:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:22,222 INFO L130 PetriNetUnfolder]: 1576/3098 cut-off events. [2023-01-28 12:09:22,222 INFO L131 PetriNetUnfolder]: For 64706/64706 co-relation queries the response was YES. [2023-01-28 12:09:22,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26742 conditions, 3098 events. 1576/3098 cut-off events. For 64706/64706 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21166 event pairs, 157 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 26566. Up to 2427 conditions per place. [2023-01-28 12:09:22,251 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 429 selfloop transitions, 185 changer transitions 23/637 dead transitions. [2023-01-28 12:09:22,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 637 transitions, 13657 flow [2023-01-28 12:09:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 12:09:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 12:09:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3173 transitions. [2023-01-28 12:09:22,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26125977768629066 [2023-01-28 12:09:22,254 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3173 transitions. [2023-01-28 12:09:22,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3173 transitions. [2023-01-28 12:09:22,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:22,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3173 transitions. [2023-01-28 12:09:22,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.65714285714286) internal successors, (3173), 35 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:22,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:22,290 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:22,290 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 9876 flow. Second operand 35 states and 3173 transitions. [2023-01-28 12:09:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 637 transitions, 13657 flow [2023-01-28 12:09:22,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 637 transitions, 13228 flow, removed 63 selfloop flow, removed 18 redundant places. [2023-01-28 12:09:22,644 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 11946 flow [2023-01-28 12:09:22,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11946, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2023-01-28 12:09:22,649 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-01-28 12:09:22,649 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 11946 flow [2023-01-28 12:09:22,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:22,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:22,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:22,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:22,854 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,SelfDestructingSolverStorable27 [2023-01-28 12:09:22,855 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:22,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 457305767, now seen corresponding path program 4 times [2023-01-28 12:09:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122009962] [2023-01-28 12:09:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:24,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122009962] [2023-01-28 12:09:24,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122009962] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:24,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515684721] [2023-01-28 12:09:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:09:24,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:24,464 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) [2023-01-28 12:09:24,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 12:09:24,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:09:24,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:09:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:24,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:24,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:09:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:09:24,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:25,528 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:25,528 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 [2023-01-28 12:09:25,589 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:25,589 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515684721] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:25,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:09:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332112375] [2023-01-28 12:09:25,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:09:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:09:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:09:25,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:09:25,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 11946 flow. Second operand has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:25,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:25,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:09:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:27,757 INFO L130 PetriNetUnfolder]: 1596/3144 cut-off events. [2023-01-28 12:09:27,757 INFO L131 PetriNetUnfolder]: For 66974/66974 co-relation queries the response was YES. [2023-01-28 12:09:27,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3144 events. 1596/3144 cut-off events. For 66974/66974 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21667 event pairs, 181 based on Foata normal form. 6/3148 useless extension candidates. Maximal degree in co-relation 27763. Up to 2479 conditions per place. [2023-01-28 12:09:27,879 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 446 selfloop transitions, 170 changer transitions 15/631 dead transitions. [2023-01-28 12:09:27,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 631 transitions, 14015 flow [2023-01-28 12:09:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 12:09:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 12:09:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2554 transitions. [2023-01-28 12:09:27,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26286537669822974 [2023-01-28 12:09:27,882 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2554 transitions. [2023-01-28 12:09:27,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2554 transitions. [2023-01-28 12:09:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:27,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2554 transitions. [2023-01-28 12:09:27,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 91.21428571428571) internal successors, (2554), 28 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:27,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:27,888 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:27,888 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 11946 flow. Second operand 28 states and 2554 transitions. [2023-01-28 12:09:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 631 transitions, 14015 flow [2023-01-28 12:09:28,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 631 transitions, 13624 flow, removed 155 selfloop flow, removed 11 redundant places. [2023-01-28 12:09:28,223 INFO L231 Difference]: Finished difference. Result has 358 places, 545 transitions, 12428 flow [2023-01-28 12:09:28,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12428, PETRI_PLACES=358, PETRI_TRANSITIONS=545} [2023-01-28 12:09:28,225 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-01-28 12:09:28,225 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 545 transitions, 12428 flow [2023-01-28 12:09:28,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:28,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:28,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:28,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:28,430 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,SelfDestructingSolverStorable28 [2023-01-28 12:09:28,431 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:28,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1593429793, now seen corresponding path program 5 times [2023-01-28 12:09:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:28,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351273336] [2023-01-28 12:09:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:29,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351273336] [2023-01-28 12:09:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351273336] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755264195] [2023-01-28 12:09:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:09:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:29,452 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) [2023-01-28 12:09:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 12:09:29,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:09:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:09:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:29,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:09:29,945 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-01-28 12:09:29,945 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 [2023-01-28 12:09:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:09:29,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:30,646 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:30,647 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 [2023-01-28 12:09:30,711 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:30,712 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:30,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755264195] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:30,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-01-28 12:09:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946209092] [2023-01-28 12:09:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:30,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 12:09:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 12:09:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-01-28 12:09:30,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:09:30,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 545 transitions, 12428 flow. Second operand has 30 states, 30 states have (on average 86.73333333333333) internal successors, (2602), 30 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:30,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:30,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:09:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:34,043 INFO L130 PetriNetUnfolder]: 1625/3195 cut-off events. [2023-01-28 12:09:34,043 INFO L131 PetriNetUnfolder]: For 70156/70156 co-relation queries the response was YES. [2023-01-28 12:09:34,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28688 conditions, 3195 events. 1625/3195 cut-off events. For 70156/70156 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22036 event pairs, 189 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 28489. Up to 2545 conditions per place. [2023-01-28 12:09:34,073 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 455 selfloop transitions, 178 changer transitions 21/654 dead transitions. [2023-01-28 12:09:34,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 654 transitions, 14454 flow [2023-01-28 12:09:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 12:09:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 12:09:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2916 transitions. [2023-01-28 12:09:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26260806916426516 [2023-01-28 12:09:34,075 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2916 transitions. [2023-01-28 12:09:34,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2916 transitions. [2023-01-28 12:09:34,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:34,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2916 transitions. [2023-01-28 12:09:34,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.125) internal successors, (2916), 32 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:34,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:34,083 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:34,083 INFO L175 Difference]: Start difference. First operand has 358 places, 545 transitions, 12428 flow. Second operand 32 states and 2916 transitions. [2023-01-28 12:09:34,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 654 transitions, 14454 flow [2023-01-28 12:09:34,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 654 transitions, 14286 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-01-28 12:09:34,469 INFO L231 Difference]: Finished difference. Result has 382 places, 554 transitions, 12870 flow [2023-01-28 12:09:34,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12870, PETRI_PLACES=382, PETRI_TRANSITIONS=554} [2023-01-28 12:09:34,470 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-01-28 12:09:34,470 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 554 transitions, 12870 flow [2023-01-28 12:09:34,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.73333333333333) internal successors, (2602), 30 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:34,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:34,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:34,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:34,676 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:34,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -571252333, now seen corresponding path program 6 times [2023-01-28 12:09:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249141797] [2023-01-28 12:09:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249141797] [2023-01-28 12:09:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249141797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955401647] [2023-01-28 12:09:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:09:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:35,496 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) [2023-01-28 12:09:35,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 12:09:35,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 12:09:35,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:09:35,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:35,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:35,933 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 [2023-01-28 12:09:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:09:35,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:36,576 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:36,576 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 [2023-01-28 12:09:36,630 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:36,631 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:36,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955401647] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:36,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:36,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:09:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551979788] [2023-01-28 12:09:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:09:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:09:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:09:36,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:09:36,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 554 transitions, 12870 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:36,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:36,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:09:36,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:39,907 INFO L130 PetriNetUnfolder]: 1722/3362 cut-off events. [2023-01-28 12:09:39,907 INFO L131 PetriNetUnfolder]: For 77736/77736 co-relation queries the response was YES. [2023-01-28 12:09:39,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 3362 events. 1722/3362 cut-off events. For 77736/77736 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23201 event pairs, 215 based on Foata normal form. 5/3366 useless extension candidates. Maximal degree in co-relation 30673. Up to 2866 conditions per place. [2023-01-28 12:09:39,943 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 517 selfloop transitions, 145 changer transitions 21/683 dead transitions. [2023-01-28 12:09:39,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 683 transitions, 15750 flow [2023-01-28 12:09:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 12:09:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 12:09:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3164 transitions. [2023-01-28 12:09:39,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26051873198847264 [2023-01-28 12:09:39,958 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3164 transitions. [2023-01-28 12:09:39,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3164 transitions. [2023-01-28 12:09:39,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:39,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3164 transitions. [2023-01-28 12:09:39,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.4) internal successors, (3164), 35 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:39,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:39,965 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:39,966 INFO L175 Difference]: Start difference. First operand has 382 places, 554 transitions, 12870 flow. Second operand 35 states and 3164 transitions. [2023-01-28 12:09:39,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 683 transitions, 15750 flow [2023-01-28 12:09:40,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 683 transitions, 15399 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-01-28 12:09:40,383 INFO L231 Difference]: Finished difference. Result has 397 places, 594 transitions, 13946 flow [2023-01-28 12:09:40,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12541, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13946, PETRI_PLACES=397, PETRI_TRANSITIONS=594} [2023-01-28 12:09:40,383 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 376 predicate places. [2023-01-28 12:09:40,383 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 594 transitions, 13946 flow [2023-01-28 12:09:40,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:40,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:40,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:40,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:40,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:40,589 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:40,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1478888581, now seen corresponding path program 7 times [2023-01-28 12:09:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:40,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013629978] [2023-01-28 12:09:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013629978] [2023-01-28 12:09:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013629978] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985388000] [2023-01-28 12:09:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:09:41,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:41,534 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) [2023-01-28 12:09:41,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 12:09:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 12:09:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:41,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:41,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:09:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:42,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:42,540 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:42,540 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 [2023-01-28 12:09:42,597 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:42,598 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:42,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985388000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:42,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:42,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-01-28 12:09:42,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406250272] [2023-01-28 12:09:42,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:42,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:09:42,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:09:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:09:42,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:09:42,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 594 transitions, 13946 flow. Second operand has 29 states, 29 states have (on average 86.62068965517241) internal successors, (2512), 29 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:42,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:42,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:09:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:46,027 INFO L130 PetriNetUnfolder]: 1781/3477 cut-off events. [2023-01-28 12:09:46,027 INFO L131 PetriNetUnfolder]: For 82653/82653 co-relation queries the response was YES. [2023-01-28 12:09:46,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32398 conditions, 3477 events. 1781/3477 cut-off events. For 82653/82653 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24306 event pairs, 198 based on Foata normal form. 3/3479 useless extension candidates. Maximal degree in co-relation 32186. Up to 3047 conditions per place. [2023-01-28 12:09:46,060 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 548 selfloop transitions, 138 changer transitions 15/701 dead transitions. [2023-01-28 12:09:46,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 701 transitions, 16517 flow [2023-01-28 12:09:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 12:09:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 12:09:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2877 transitions. [2023-01-28 12:09:46,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2590958213256484 [2023-01-28 12:09:46,063 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2877 transitions. [2023-01-28 12:09:46,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2877 transitions. [2023-01-28 12:09:46,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:46,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2877 transitions. [2023-01-28 12:09:46,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 89.90625) internal successors, (2877), 32 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:46,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:46,069 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:46,070 INFO L175 Difference]: Start difference. First operand has 397 places, 594 transitions, 13946 flow. Second operand 32 states and 2877 transitions. [2023-01-28 12:09:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 701 transitions, 16517 flow [2023-01-28 12:09:46,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 701 transitions, 15705 flow, removed 83 selfloop flow, removed 22 redundant places. [2023-01-28 12:09:46,513 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 14369 flow [2023-01-28 12:09:46,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13178, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14369, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-01-28 12:09:46,514 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-01-28 12:09:46,514 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 14369 flow [2023-01-28 12:09:46,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.62068965517241) internal successors, (2512), 29 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:46,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 12:09:46,719 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,SelfDestructingSolverStorable31 [2023-01-28 12:09:46,719 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:46,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2091258710, now seen corresponding path program 8 times [2023-01-28 12:09:46,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:46,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923178407] [2023-01-28 12:09:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:46,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923178407] [2023-01-28 12:09:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923178407] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181942087] [2023-01-28 12:09:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:09:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:46,854 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) [2023-01-28 12:09:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 12:09:46,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:09:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 12:09:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:47,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181942087] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 12:09:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242148002] [2023-01-28 12:09:47,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 12:09:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 12:09:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 12:09:47,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:09:47,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 14369 flow. Second operand has 14 states, 14 states have (on average 133.92857142857142) internal successors, (1875), 14 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:47,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:47,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:09:47,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:49,381 INFO L130 PetriNetUnfolder]: 2635/5195 cut-off events. [2023-01-28 12:09:49,381 INFO L131 PetriNetUnfolder]: For 140402/140402 co-relation queries the response was YES. [2023-01-28 12:09:49,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 5195 events. 2635/5195 cut-off events. For 140402/140402 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39183 event pairs, 297 based on Foata normal form. 70/5264 useless extension candidates. Maximal degree in co-relation 47262. Up to 1289 conditions per place. [2023-01-28 12:09:49,436 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 424 selfloop transitions, 485 changer transitions 4/913 dead transitions. [2023-01-28 12:09:49,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 913 transitions, 21309 flow [2023-01-28 12:09:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 12:09:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 12:09:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2931 transitions. [2023-01-28 12:09:49,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022231370934541 [2023-01-28 12:09:49,438 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2931 transitions. [2023-01-28 12:09:49,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2931 transitions. [2023-01-28 12:09:49,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:49,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2931 transitions. [2023-01-28 12:09:49,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 139.57142857142858) internal successors, (2931), 21 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:49,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:49,443 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:49,443 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 14369 flow. Second operand 21 states and 2931 transitions. [2023-01-28 12:09:49,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 913 transitions, 21309 flow [2023-01-28 12:09:50,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 913 transitions, 20964 flow, removed 108 selfloop flow, removed 20 redundant places. [2023-01-28 12:09:50,304 INFO L231 Difference]: Finished difference. Result has 416 places, 798 transitions, 19659 flow [2023-01-28 12:09:50,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13777, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19659, PETRI_PLACES=416, PETRI_TRANSITIONS=798} [2023-01-28 12:09:50,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-01-28 12:09:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 798 transitions, 19659 flow [2023-01-28 12:09:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 133.92857142857142) internal successors, (1875), 14 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:50,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:50,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 12:09:50,511 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:50,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1479483227, now seen corresponding path program 9 times [2023-01-28 12:09:50,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:50,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783450647] [2023-01-28 12:09:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:09:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783450647] [2023-01-28 12:09:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783450647] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390112236] [2023-01-28 12:09:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:09:51,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:51,092 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) [2023-01-28 12:09:51,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 12:09:51,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:09:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 12:09:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:51,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:09:51,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:09:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:51,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:52,128 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:09:52,128 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 [2023-01-28 12:09:52,176 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:09:52,176 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:09:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:52,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390112236] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:52,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:52,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-01-28 12:09:52,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555149573] [2023-01-28 12:09:52,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:09:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:09:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:09:52,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:09:52,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 798 transitions, 19659 flow. Second operand has 28 states, 28 states have (on average 93.67857142857143) internal successors, (2623), 28 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:52,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:52,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:09:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:55,361 INFO L130 PetriNetUnfolder]: 2663/5250 cut-off events. [2023-01-28 12:09:55,361 INFO L131 PetriNetUnfolder]: For 157229/157229 co-relation queries the response was YES. [2023-01-28 12:09:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 5250 events. 2663/5250 cut-off events. For 157229/157229 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39639 event pairs, 370 based on Foata normal form. 7/5256 useless extension candidates. Maximal degree in co-relation 51549. Up to 4759 conditions per place. [2023-01-28 12:09:55,417 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 729 selfloop transitions, 141 changer transitions 25/895 dead transitions. [2023-01-28 12:09:55,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 895 transitions, 22456 flow [2023-01-28 12:09:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 12:09:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 12:09:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3301 transitions. [2023-01-28 12:09:55,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797931852856416 [2023-01-28 12:09:55,420 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3301 transitions. [2023-01-28 12:09:55,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3301 transitions. [2023-01-28 12:09:55,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:55,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3301 transitions. [2023-01-28 12:09:55,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 97.08823529411765) internal successors, (3301), 34 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:55,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:55,521 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:55,521 INFO L175 Difference]: Start difference. First operand has 416 places, 798 transitions, 19659 flow. Second operand 34 states and 3301 transitions. [2023-01-28 12:09:55,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 895 transitions, 22456 flow [2023-01-28 12:09:56,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 895 transitions, 21514 flow, removed 173 selfloop flow, removed 10 redundant places. [2023-01-28 12:09:56,594 INFO L231 Difference]: Finished difference. Result has 446 places, 816 transitions, 19682 flow [2023-01-28 12:09:56,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=18721, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19682, PETRI_PLACES=446, PETRI_TRANSITIONS=816} [2023-01-28 12:09:56,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-01-28 12:09:56,595 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 816 transitions, 19682 flow [2023-01-28 12:09:56,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.67857142857143) internal successors, (2623), 28 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:56,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:56,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:56,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:56,800 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:56,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1984941564, now seen corresponding path program 10 times [2023-01-28 12:09:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:56,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086481198] [2023-01-28 12:09:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:56,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086481198] [2023-01-28 12:09:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086481198] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549989127] [2023-01-28 12:09:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:09:56,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:56,937 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) [2023-01-28 12:09:56,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 12:09:57,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:09:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:09:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:57,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:57,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549989127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:57,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:57,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 12:09:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315556748] [2023-01-28 12:09:57,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:09:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:09:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:09:57,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:09:57,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 816 transitions, 19682 flow. Second operand has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:57,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:57,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:09:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:10:01,179 INFO L130 PetriNetUnfolder]: 2927/5835 cut-off events. [2023-01-28 12:10:01,179 INFO L131 PetriNetUnfolder]: For 171867/171867 co-relation queries the response was YES. [2023-01-28 12:10:01,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55933 conditions, 5835 events. 2927/5835 cut-off events. For 171867/171867 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45752 event pairs, 758 based on Foata normal form. 62/5896 useless extension candidates. Maximal degree in co-relation 55707. Up to 4027 conditions per place. [2023-01-28 12:10:01,241 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 712 selfloop transitions, 315 changer transitions 1/1028 dead transitions. [2023-01-28 12:10:01,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1028 transitions, 24851 flow [2023-01-28 12:10:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 12:10:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 12:10:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5098 transitions. [2023-01-28 12:10:01,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39707142300802245 [2023-01-28 12:10:01,244 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5098 transitions. [2023-01-28 12:10:01,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5098 transitions. [2023-01-28 12:10:01,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:10:01,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5098 transitions. [2023-01-28 12:10:01,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 137.78378378378378) internal successors, (5098), 37 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:01,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:01,253 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:01,253 INFO L175 Difference]: Start difference. First operand has 446 places, 816 transitions, 19682 flow. Second operand 37 states and 5098 transitions. [2023-01-28 12:10:01,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1028 transitions, 24851 flow [2023-01-28 12:10:02,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1028 transitions, 24500 flow, removed 71 selfloop flow, removed 27 redundant places. [2023-01-28 12:10:02,320 INFO L231 Difference]: Finished difference. Result has 467 places, 910 transitions, 22655 flow [2023-01-28 12:10:02,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=19341, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22655, PETRI_PLACES=467, PETRI_TRANSITIONS=910} [2023-01-28 12:10:02,321 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2023-01-28 12:10:02,321 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 910 transitions, 22655 flow [2023-01-28 12:10:02,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:02,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:10:02,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:10:02,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 12:10:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:02,524 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:10:02,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:10:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2141675087, now seen corresponding path program 11 times [2023-01-28 12:10:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:10:02,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411541714] [2023-01-28 12:10:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:10:02,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:10:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:10:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:10:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:10:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411541714] [2023-01-28 12:10:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411541714] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:10:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432249606] [2023-01-28 12:10:03,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:10:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:10:03,273 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) [2023-01-28 12:10:03,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 12:10:03,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:10:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:10:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:10:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:10:03,895 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-01-28 12:10:03,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 188 [2023-01-28 12:10:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:10:05,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:10:06,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:10:06,079 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 195 [2023-01-28 12:10:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432249606] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:10:06,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:10:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 27 [2023-01-28 12:10:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600923951] [2023-01-28 12:10:06,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:10:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:10:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:10:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:10:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:10:06,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:10:06,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 910 transitions, 22655 flow. Second operand has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:06,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:10:06,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:10:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:10:09,856 INFO L130 PetriNetUnfolder]: 3012/5990 cut-off events. [2023-01-28 12:10:09,856 INFO L131 PetriNetUnfolder]: For 182321/182321 co-relation queries the response was YES. [2023-01-28 12:10:09,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59577 conditions, 5990 events. 3012/5990 cut-off events. For 182321/182321 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47072 event pairs, 423 based on Foata normal form. 2/5991 useless extension candidates. Maximal degree in co-relation 59253. Up to 5564 conditions per place. [2023-01-28 12:10:09,924 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 877 selfloop transitions, 114 changer transitions 11/1002 dead transitions. [2023-01-28 12:10:09,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1002 transitions, 25903 flow [2023-01-28 12:10:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 12:10:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 12:10:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2523 transitions. [2023-01-28 12:10:09,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25967476327706873 [2023-01-28 12:10:09,927 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2523 transitions. [2023-01-28 12:10:09,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2523 transitions. [2023-01-28 12:10:09,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:10:09,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2523 transitions. [2023-01-28 12:10:09,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 90.10714285714286) internal successors, (2523), 28 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:09,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:09,932 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:09,932 INFO L175 Difference]: Start difference. First operand has 467 places, 910 transitions, 22655 flow. Second operand 28 states and 2523 transitions. [2023-01-28 12:10:09,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1002 transitions, 25903 flow [2023-01-28 12:10:11,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1002 transitions, 25065 flow, removed 306 selfloop flow, removed 12 redundant places. [2023-01-28 12:10:11,541 INFO L231 Difference]: Finished difference. Result has 487 places, 943 transitions, 23082 flow [2023-01-28 12:10:11,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21844, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23082, PETRI_PLACES=487, PETRI_TRANSITIONS=943} [2023-01-28 12:10:11,542 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-01-28 12:10:11,542 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 943 transitions, 23082 flow [2023-01-28 12:10:11,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:11,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:10:11,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:10:11,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 12:10:11,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:11,747 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:10:11,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:10:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1193348527, now seen corresponding path program 12 times [2023-01-28 12:10:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:10:11,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206879016] [2023-01-28 12:10:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:10:11,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:10:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:10:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:10:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:10:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206879016] [2023-01-28 12:10:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206879016] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:10:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102295028] [2023-01-28 12:10:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:10:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:10:12,370 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) [2023-01-28 12:10:12,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 12:10:12,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 12:10:12,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:10:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:10:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:10:12,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:10:12,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:10:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:10:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:10:13,361 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:10:13,362 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:10:13,604 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:10:13,604 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 [2023-01-28 12:10:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:13,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102295028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:10:13,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:10:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2023-01-28 12:10:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003843952] [2023-01-28 12:10:13,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:10:13,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 12:10:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:10:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 12:10:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-01-28 12:10:13,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:10:13,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 943 transitions, 23082 flow. Second operand has 26 states, 26 states have (on average 86.73076923076923) internal successors, (2255), 26 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:13,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:10:13,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:10:13,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:10:16,329 INFO L130 PetriNetUnfolder]: 3067/6097 cut-off events. [2023-01-28 12:10:16,329 INFO L131 PetriNetUnfolder]: For 185882/185882 co-relation queries the response was YES. [2023-01-28 12:10:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60012 conditions, 6097 events. 3067/6097 cut-off events. For 185882/185882 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47913 event pairs, 399 based on Foata normal form. 3/6099 useless extension candidates. Maximal degree in co-relation 59675. Up to 5633 conditions per place. [2023-01-28 12:10:16,393 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 884 selfloop transitions, 125 changer transitions 14/1023 dead transitions. [2023-01-28 12:10:16,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1023 transitions, 26155 flow [2023-01-28 12:10:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 12:10:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 12:10:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2168 transitions. [2023-01-28 12:10:16,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26032660902977905 [2023-01-28 12:10:16,395 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2168 transitions. [2023-01-28 12:10:16,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2168 transitions. [2023-01-28 12:10:16,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:10:16,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2168 transitions. [2023-01-28 12:10:16,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.33333333333333) internal successors, (2168), 24 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:16,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:16,400 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:16,400 INFO L175 Difference]: Start difference. First operand has 487 places, 943 transitions, 23082 flow. Second operand 24 states and 2168 transitions. [2023-01-28 12:10:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1023 transitions, 26155 flow [2023-01-28 12:10:17,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1023 transitions, 25755 flow, removed 153 selfloop flow, removed 14 redundant places. [2023-01-28 12:10:17,710 INFO L231 Difference]: Finished difference. Result has 503 places, 965 transitions, 23656 flow [2023-01-28 12:10:17,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=22818, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23656, PETRI_PLACES=503, PETRI_TRANSITIONS=965} [2023-01-28 12:10:17,711 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 482 predicate places. [2023-01-28 12:10:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 965 transitions, 23656 flow [2023-01-28 12:10:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 86.73076923076923) internal successors, (2255), 26 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:17,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:10:17,711 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:10:17,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 12:10:17,918 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,SelfDestructingSolverStorable36 [2023-01-28 12:10:17,919 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:10:17,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:10:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1931491441, now seen corresponding path program 12 times [2023-01-28 12:10:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:10:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467482556] [2023-01-28 12:10:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:10:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:10:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:10:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:10:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467482556] [2023-01-28 12:10:18,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467482556] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:10:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662099726] [2023-01-28 12:10:18,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:10:18,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:18,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:10:18,084 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) [2023-01-28 12:10:18,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 12:10:18,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:10:18,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:10:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:10:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:10:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:18,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:10:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:18,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662099726] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:10:18,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:10:18,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-28 12:10:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887276792] [2023-01-28 12:10:18,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:10:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 12:10:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:10:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 12:10:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-01-28 12:10:18,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:10:18,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 965 transitions, 23656 flow. Second operand has 15 states, 15 states have (on average 133.93333333333334) internal successors, (2009), 15 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:18,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:10:18,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:10:18,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:10:21,845 INFO L130 PetriNetUnfolder]: 3100/6163 cut-off events. [2023-01-28 12:10:21,845 INFO L131 PetriNetUnfolder]: For 201811/201811 co-relation queries the response was YES. [2023-01-28 12:10:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61095 conditions, 6163 events. 3100/6163 cut-off events. For 201811/201811 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 48868 event pairs, 874 based on Foata normal form. 48/6210 useless extension candidates. Maximal degree in co-relation 60743. Up to 4519 conditions per place. [2023-01-28 12:10:21,914 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 781 selfloop transitions, 270 changer transitions 0/1051 dead transitions. [2023-01-28 12:10:21,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1051 transitions, 26130 flow [2023-01-28 12:10:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 12:10:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 12:10:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3582 transitions. [2023-01-28 12:10:21,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39702948348481487 [2023-01-28 12:10:21,917 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3582 transitions. [2023-01-28 12:10:21,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3582 transitions. [2023-01-28 12:10:21,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:10:21,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3582 transitions. [2023-01-28 12:10:21,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.76923076923077) internal successors, (3582), 26 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:21,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:21,923 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:21,923 INFO L175 Difference]: Start difference. First operand has 503 places, 965 transitions, 23656 flow. Second operand 26 states and 3582 transitions. [2023-01-28 12:10:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1051 transitions, 26130 flow [2023-01-28 12:10:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1051 transitions, 25891 flow, removed 51 selfloop flow, removed 12 redundant places. [2023-01-28 12:10:23,282 INFO L231 Difference]: Finished difference. Result has 516 places, 972 transitions, 24071 flow [2023-01-28 12:10:23,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23417, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24071, PETRI_PLACES=516, PETRI_TRANSITIONS=972} [2023-01-28 12:10:23,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 495 predicate places. [2023-01-28 12:10:23,283 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 972 transitions, 24071 flow [2023-01-28 12:10:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.93333333333334) internal successors, (2009), 15 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:23,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:10:23,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:10:23,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 12:10:23,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 12:10:23,493 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:10:23,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:10:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -259290172, now seen corresponding path program 13 times [2023-01-28 12:10:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:10:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518094566] [2023-01-28 12:10:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:10:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:10:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:10:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:23,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:10:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518094566] [2023-01-28 12:10:23,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518094566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:10:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576152812] [2023-01-28 12:10:23,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:10:23,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:10:23,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:10:23,651 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) [2023-01-28 12:10:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 12:10:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:10:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:10:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:10:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:10:23,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:06,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576152812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:06,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:06,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 12:11:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205926466] [2023-01-28 12:11:06,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:11:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:11:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:11:06,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:11:06,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 972 transitions, 24071 flow. Second operand has 18 states, 18 states have (on average 133.66666666666666) internal successors, (2406), 18 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:06,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:06,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:11:06,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:17,259 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 [] [2023-01-28 12:11:19,717 INFO L130 PetriNetUnfolder]: 3152/6383 cut-off events. [2023-01-28 12:11:19,717 INFO L131 PetriNetUnfolder]: For 209779/209779 co-relation queries the response was YES. [2023-01-28 12:11:19,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63373 conditions, 6383 events. 3152/6383 cut-off events. For 209779/209779 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 51810 event pairs, 506 based on Foata normal form. 60/6442 useless extension candidates. Maximal degree in co-relation 63098. Up to 2755 conditions per place. [2023-01-28 12:11:19,964 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 631 selfloop transitions, 478 changer transitions 4/1113 dead transitions. [2023-01-28 12:11:19,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1113 transitions, 28363 flow [2023-01-28 12:11:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 12:11:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 12:11:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4948 transitions. [2023-01-28 12:11:19,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39609349983989756 [2023-01-28 12:11:19,968 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4948 transitions. [2023-01-28 12:11:19,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4948 transitions. [2023-01-28 12:11:19,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:19,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4948 transitions. [2023-01-28 12:11:19,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 137.44444444444446) internal successors, (4948), 36 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:19,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:19,977 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:19,977 INFO L175 Difference]: Start difference. First operand has 516 places, 972 transitions, 24071 flow. Second operand 36 states and 4948 transitions. [2023-01-28 12:11:19,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1113 transitions, 28363 flow [2023-01-28 12:11:21,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1113 transitions, 27772 flow, removed 68 selfloop flow, removed 20 redundant places. [2023-01-28 12:11:21,515 INFO L231 Difference]: Finished difference. Result has 537 places, 1022 transitions, 26219 flow [2023-01-28 12:11:21,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23287, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26219, PETRI_PLACES=537, PETRI_TRANSITIONS=1022} [2023-01-28 12:11:21,516 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 516 predicate places. [2023-01-28 12:11:21,516 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1022 transitions, 26219 flow [2023-01-28 12:11:21,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.66666666666666) internal successors, (2406), 18 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:21,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:21,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:21,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 12:11:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 12:11:21,722 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:21,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1543461211, now seen corresponding path program 14 times [2023-01-28 12:11:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:21,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280973478] [2023-01-28 12:11:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:11:22,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280973478] [2023-01-28 12:11:22,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280973478] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:22,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560466052] [2023-01-28 12:11:22,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:11:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:22,327 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) [2023-01-28 12:11:22,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 12:11:22,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:11:22,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:11:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:11:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:22,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:11:22,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:11:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:11:22,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:23,346 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:11:23,346 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:11:23,484 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:11:23,484 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 [2023-01-28 12:11:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:23,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560466052] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:23,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:23,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:11:23,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651878040] [2023-01-28 12:11:23,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:11:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:11:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:11:23,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:11:23,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1022 transitions, 26219 flow. Second operand has 29 states, 29 states have (on average 93.65517241379311) internal successors, (2716), 29 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:23,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:23,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:11:23,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:27,177 INFO L130 PetriNetUnfolder]: 3168/6417 cut-off events. [2023-01-28 12:11:27,178 INFO L131 PetriNetUnfolder]: For 224130/224130 co-relation queries the response was YES. [2023-01-28 12:11:27,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65830 conditions, 6417 events. 3168/6417 cut-off events. For 224130/224130 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51982 event pairs, 484 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 65462. Up to 5900 conditions per place. [2023-01-28 12:11:27,264 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 971 selfloop transitions, 125 changer transitions 15/1111 dead transitions. [2023-01-28 12:11:27,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1111 transitions, 29248 flow [2023-01-28 12:11:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 12:11:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 12:11:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3015 transitions. [2023-01-28 12:11:27,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28028260667472343 [2023-01-28 12:11:27,266 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3015 transitions. [2023-01-28 12:11:27,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3015 transitions. [2023-01-28 12:11:27,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:27,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3015 transitions. [2023-01-28 12:11:27,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.25806451612904) internal successors, (3015), 31 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:27,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:27,273 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:27,273 INFO L175 Difference]: Start difference. First operand has 537 places, 1022 transitions, 26219 flow. Second operand 31 states and 3015 transitions. [2023-01-28 12:11:27,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1111 transitions, 29248 flow [2023-01-28 12:11:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1111 transitions, 28464 flow, removed 191 selfloop flow, removed 21 redundant places. [2023-01-28 12:11:29,215 INFO L231 Difference]: Finished difference. Result has 554 places, 1035 transitions, 26181 flow [2023-01-28 12:11:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25416, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26181, PETRI_PLACES=554, PETRI_TRANSITIONS=1035} [2023-01-28 12:11:29,216 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 533 predicate places. [2023-01-28 12:11:29,216 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1035 transitions, 26181 flow [2023-01-28 12:11:29,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.65517241379311) internal successors, (2716), 29 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:29,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:29,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:29,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 12:11:29,421 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,SelfDestructingSolverStorable39 [2023-01-28 12:11:29,422 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:29,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1051477855, now seen corresponding path program 15 times [2023-01-28 12:11:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888660762] [2023-01-28 12:11:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:11:30,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888660762] [2023-01-28 12:11:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888660762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564042639] [2023-01-28 12:11:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:11:30,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:30,054 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) [2023-01-28 12:11:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 12:11:30,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:11:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:11:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:11:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:30,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:11:30,407 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 [2023-01-28 12:11:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:11:30,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:30,931 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:11:30,932 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:11:31,045 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:11:31,045 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 [2023-01-28 12:11:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564042639] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:31,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:31,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:11:31,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333654531] [2023-01-28 12:11:31,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:31,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:11:31,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:11:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:11:31,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:11:31,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1035 transitions, 26181 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:31,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:31,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:11:31,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:34,866 INFO L130 PetriNetUnfolder]: 3181/6436 cut-off events. [2023-01-28 12:11:34,866 INFO L131 PetriNetUnfolder]: For 205506/205506 co-relation queries the response was YES. [2023-01-28 12:11:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64804 conditions, 6436 events. 3181/6436 cut-off events. For 205506/205506 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51860 event pairs, 490 based on Foata normal form. 4/6439 useless extension candidates. Maximal degree in co-relation 64441. Up to 5926 conditions per place. [2023-01-28 12:11:34,951 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 969 selfloop transitions, 139 changer transitions 17/1125 dead transitions. [2023-01-28 12:11:34,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1125 transitions, 29024 flow [2023-01-28 12:11:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 12:11:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 12:11:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2986 transitions. [2023-01-28 12:11:34,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.260763252117719 [2023-01-28 12:11:34,953 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2986 transitions. [2023-01-28 12:11:34,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2986 transitions. [2023-01-28 12:11:34,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:34,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2986 transitions. [2023-01-28 12:11:34,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.48484848484848) internal successors, (2986), 33 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:34,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:34,960 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:34,960 INFO L175 Difference]: Start difference. First operand has 554 places, 1035 transitions, 26181 flow. Second operand 33 states and 2986 transitions. [2023-01-28 12:11:34,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1125 transitions, 29024 flow [2023-01-28 12:11:36,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1125 transitions, 28741 flow, removed 43 selfloop flow, removed 23 redundant places. [2023-01-28 12:11:36,968 INFO L231 Difference]: Finished difference. Result has 565 places, 1040 transitions, 26390 flow [2023-01-28 12:11:36,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25898, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26390, PETRI_PLACES=565, PETRI_TRANSITIONS=1040} [2023-01-28 12:11:36,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-01-28 12:11:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1040 transitions, 26390 flow [2023-01-28 12:11:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:36,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:36,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 12:11:37,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:37,177 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:37,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash 546417695, now seen corresponding path program 16 times [2023-01-28 12:11:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600684932] [2023-01-28 12:11:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:37,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:11:37,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600684932] [2023-01-28 12:11:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600684932] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373392129] [2023-01-28 12:11:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:11:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:37,772 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) [2023-01-28 12:11:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 12:11:37,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:11:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:11:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:11:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:38,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:11:38,107 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 [2023-01-28 12:11:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:11:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:38,694 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:11:38,694 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:11:38,780 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:11:38,781 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 [2023-01-28 12:11:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:38,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373392129] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:38,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:38,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-28 12:11:38,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807039557] [2023-01-28 12:11:38,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:38,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:11:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:11:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:11:38,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:11:38,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1040 transitions, 26390 flow. Second operand has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:38,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:38,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:11:38,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:42,853 INFO L130 PetriNetUnfolder]: 3250/6555 cut-off events. [2023-01-28 12:11:42,853 INFO L131 PetriNetUnfolder]: For 212501/212501 co-relation queries the response was YES. [2023-01-28 12:11:42,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66546 conditions, 6555 events. 3250/6555 cut-off events. For 212501/212501 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53002 event pairs, 445 based on Foata normal form. 5/6559 useless extension candidates. Maximal degree in co-relation 66179. Up to 6016 conditions per place. [2023-01-28 12:11:42,945 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1003 selfloop transitions, 135 changer transitions 14/1152 dead transitions. [2023-01-28 12:11:42,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1152 transitions, 29881 flow [2023-01-28 12:11:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 12:11:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 12:11:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3030 transitions. [2023-01-28 12:11:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2816770475039509 [2023-01-28 12:11:42,947 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3030 transitions. [2023-01-28 12:11:42,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3030 transitions. [2023-01-28 12:11:42,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:42,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3030 transitions. [2023-01-28 12:11:42,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.74193548387096) internal successors, (3030), 31 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:42,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:42,954 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:42,954 INFO L175 Difference]: Start difference. First operand has 565 places, 1040 transitions, 26390 flow. Second operand 31 states and 3030 transitions. [2023-01-28 12:11:42,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1152 transitions, 29881 flow [2023-01-28 12:11:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1152 transitions, 29609 flow, removed 36 selfloop flow, removed 22 redundant places. [2023-01-28 12:11:44,864 INFO L231 Difference]: Finished difference. Result has 579 places, 1065 transitions, 27211 flow [2023-01-28 12:11:44,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26118, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27211, PETRI_PLACES=579, PETRI_TRANSITIONS=1065} [2023-01-28 12:11:44,865 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 558 predicate places. [2023-01-28 12:11:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1065 transitions, 27211 flow [2023-01-28 12:11:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:44,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:44,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 12:11:45,070 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,SelfDestructingSolverStorable41 [2023-01-28 12:11:45,070 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:45,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash -213905598, now seen corresponding path program 17 times [2023-01-28 12:11:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:45,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426800470] [2023-01-28 12:11:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:45,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426800470] [2023-01-28 12:11:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426800470] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898524326] [2023-01-28 12:11:45,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:11:45,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:45,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:45,236 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) [2023-01-28 12:11:45,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 12:11:45,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:11:45,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:11:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 12:11:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:45,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 12:11:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898524326] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:45,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:45,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 15 [2023-01-28 12:11:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991168027] [2023-01-28 12:11:45,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:45,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 12:11:45,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 12:11:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-28 12:11:45,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:11:45,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1065 transitions, 27211 flow. Second operand has 15 states, 15 states have (on average 134.13333333333333) internal successors, (2012), 15 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:45,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:45,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:11:45,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:48,818 INFO L130 PetriNetUnfolder]: 3398/6795 cut-off events. [2023-01-28 12:11:48,818 INFO L131 PetriNetUnfolder]: For 233820/233820 co-relation queries the response was YES. [2023-01-28 12:11:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70103 conditions, 6795 events. 3398/6795 cut-off events. For 233820/233820 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 54901 event pairs, 103 based on Foata normal form. 60/6854 useless extension candidates. Maximal degree in co-relation 69728. Up to 2200 conditions per place. [2023-01-28 12:11:48,917 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 640 selfloop transitions, 644 changer transitions 4/1288 dead transitions. [2023-01-28 12:11:48,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1288 transitions, 34763 flow [2023-01-28 12:11:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 12:11:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 12:11:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3299 transitions. [2023-01-28 12:11:48,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39613352545629205 [2023-01-28 12:11:48,920 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3299 transitions. [2023-01-28 12:11:48,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3299 transitions. [2023-01-28 12:11:48,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:48,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3299 transitions. [2023-01-28 12:11:48,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 137.45833333333334) internal successors, (3299), 24 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:48,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:48,926 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:48,926 INFO L175 Difference]: Start difference. First operand has 579 places, 1065 transitions, 27211 flow. Second operand 24 states and 3299 transitions. [2023-01-28 12:11:48,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1288 transitions, 34763 flow [2023-01-28 12:11:51,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1288 transitions, 34238 flow, removed 112 selfloop flow, removed 27 redundant places. [2023-01-28 12:11:51,084 INFO L231 Difference]: Finished difference. Result has 580 places, 1148 transitions, 30694 flow [2023-01-28 12:11:51,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26633, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30694, PETRI_PLACES=580, PETRI_TRANSITIONS=1148} [2023-01-28 12:11:51,085 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-01-28 12:11:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1148 transitions, 30694 flow [2023-01-28 12:11:51,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.13333333333333) internal successors, (2012), 15 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:51,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:51,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 12:11:51,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:51,286 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:51,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1679609131, now seen corresponding path program 13 times [2023-01-28 12:11:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:51,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916356886] [2023-01-28 12:11:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:51,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916356886] [2023-01-28 12:11:51,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916356886] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497488629] [2023-01-28 12:11:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:11:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:51,456 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) [2023-01-28 12:11:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 12:11:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:11:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:51,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497488629] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:51,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:51,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 12:11:51,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731560938] [2023-01-28 12:11:51,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:11:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:11:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:11:51,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:11:51,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1148 transitions, 30694 flow. Second operand has 19 states, 19 states have (on average 133.6315789473684) internal successors, (2539), 19 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:51,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:51,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:11:51,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:57,244 INFO L130 PetriNetUnfolder]: 4418/8625 cut-off events. [2023-01-28 12:11:57,245 INFO L131 PetriNetUnfolder]: For 311446/311446 co-relation queries the response was YES. [2023-01-28 12:11:57,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91283 conditions, 8625 events. 4418/8625 cut-off events. For 311446/311446 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 71001 event pairs, 74 based on Foata normal form. 28/8652 useless extension candidates. Maximal degree in co-relation 90894. Up to 2253 conditions per place. [2023-01-28 12:11:57,363 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 507 selfloop transitions, 1030 changer transitions 0/1537 dead transitions. [2023-01-28 12:11:57,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1537 transitions, 41856 flow [2023-01-28 12:11:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 12:11:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 12:11:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5111 transitions. [2023-01-28 12:11:57,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980839629254615 [2023-01-28 12:11:57,366 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5111 transitions. [2023-01-28 12:11:57,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5111 transitions. [2023-01-28 12:11:57,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:11:57,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5111 transitions. [2023-01-28 12:11:57,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 138.13513513513513) internal successors, (5111), 37 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:57,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:57,374 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:57,374 INFO L175 Difference]: Start difference. First operand has 580 places, 1148 transitions, 30694 flow. Second operand 37 states and 5111 transitions. [2023-01-28 12:11:57,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1537 transitions, 41856 flow [2023-01-28 12:12:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1537 transitions, 40470 flow, removed 435 selfloop flow, removed 12 redundant places. [2023-01-28 12:12:00,842 INFO L231 Difference]: Finished difference. Result has 605 places, 1366 transitions, 37792 flow [2023-01-28 12:12:00,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=29652, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=37792, PETRI_PLACES=605, PETRI_TRANSITIONS=1366} [2023-01-28 12:12:00,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 584 predicate places. [2023-01-28 12:12:00,844 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1366 transitions, 37792 flow [2023-01-28 12:12:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.6315789473684) internal successors, (2539), 19 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:00,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:00,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:00,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-01-28 12:12:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:01,049 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:01,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash 204373709, now seen corresponding path program 14 times [2023-01-28 12:12:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136060308] [2023-01-28 12:12:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:01,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136060308] [2023-01-28 12:12:01,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136060308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777859984] [2023-01-28 12:12:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:12:01,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:01,181 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) [2023-01-28 12:12:01,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 12:12:01,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:12:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:12:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:01,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:01,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777859984] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:01,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:01,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 12:12:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761026740] [2023-01-28 12:12:01,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:12:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:12:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:12:01,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:12:01,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1366 transitions, 37792 flow. Second operand has 19 states, 19 states have (on average 133.6315789473684) internal successors, (2539), 19 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:01,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:01,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:12:01,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:12:06,512 INFO L130 PetriNetUnfolder]: 4443/8652 cut-off events. [2023-01-28 12:12:06,512 INFO L131 PetriNetUnfolder]: For 281789/281789 co-relation queries the response was YES. [2023-01-28 12:12:06,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91668 conditions, 8652 events. 4443/8652 cut-off events. For 281789/281789 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 71067 event pairs, 74 based on Foata normal form. 4/8655 useless extension candidates. Maximal degree in co-relation 91296. Up to 2263 conditions per place. [2023-01-28 12:12:06,621 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 501 selfloop transitions, 1023 changer transitions 0/1524 dead transitions. [2023-01-28 12:12:06,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1524 transitions, 43203 flow [2023-01-28 12:12:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 12:12:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 12:12:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3753 transitions. [2023-01-28 12:12:06,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057636887608067 [2023-01-28 12:12:06,624 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3753 transitions. [2023-01-28 12:12:06,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3753 transitions. [2023-01-28 12:12:06,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:06,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3753 transitions. [2023-01-28 12:12:06,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 139.0) internal successors, (3753), 27 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:06,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:06,630 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:06,630 INFO L175 Difference]: Start difference. First operand has 605 places, 1366 transitions, 37792 flow. Second operand 27 states and 3753 transitions. [2023-01-28 12:12:06,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1524 transitions, 43203 flow [2023-01-28 12:12:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1524 transitions, 41009 flow, removed 591 selfloop flow, removed 16 redundant places. [2023-01-28 12:12:09,717 INFO L231 Difference]: Finished difference. Result has 618 places, 1378 transitions, 38606 flow [2023-01-28 12:12:09,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=35582, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38606, PETRI_PLACES=618, PETRI_TRANSITIONS=1378} [2023-01-28 12:12:09,719 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-01-28 12:12:09,719 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1378 transitions, 38606 flow [2023-01-28 12:12:09,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.6315789473684) internal successors, (2539), 19 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:09,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:09,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:09,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 12:12:09,924 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,SelfDestructingSolverStorable44 [2023-01-28 12:12:09,924 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:09,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1894697581, now seen corresponding path program 18 times [2023-01-28 12:12:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:09,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962907413] [2023-01-28 12:12:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:09,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:12:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962907413] [2023-01-28 12:12:10,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962907413] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94410354] [2023-01-28 12:12:10,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:12:10,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:10,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:10,629 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) [2023-01-28 12:12:10,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 12:12:10,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:12:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:12:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:10,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:12:10,995 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 [2023-01-28 12:12:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:12:10,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:11,591 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:12:11,592 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:12:11,705 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:12:11,706 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 [2023-01-28 12:12:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94410354] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:11,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:12:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196490299] [2023-01-28 12:12:11,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:12:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:12:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:12:11,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:12:11,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1378 transitions, 38606 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:11,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:11,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:12:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:12:19,666 INFO L130 PetriNetUnfolder]: 4663/9052 cut-off events. [2023-01-28 12:12:19,666 INFO L131 PetriNetUnfolder]: For 292736/292736 co-relation queries the response was YES. [2023-01-28 12:12:19,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 9052 events. 4663/9052 cut-off events. For 292736/292736 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 74680 event pairs, 534 based on Foata normal form. 8/9059 useless extension candidates. Maximal degree in co-relation 95557. Up to 8328 conditions per place. [2023-01-28 12:12:19,781 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1340 selfloop transitions, 238 changer transitions 19/1597 dead transitions. [2023-01-28 12:12:19,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1597 transitions, 45312 flow [2023-01-28 12:12:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 12:12:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 12:12:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4351 transitions. [2023-01-28 12:12:19,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26122718539865514 [2023-01-28 12:12:19,802 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4351 transitions. [2023-01-28 12:12:19,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4351 transitions. [2023-01-28 12:12:19,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:19,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4351 transitions. [2023-01-28 12:12:19,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 90.64583333333333) internal successors, (4351), 48 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:19,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:19,812 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:19,812 INFO L175 Difference]: Start difference. First operand has 618 places, 1378 transitions, 38606 flow. Second operand 48 states and 4351 transitions. [2023-01-28 12:12:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1597 transitions, 45312 flow [2023-01-28 12:12:23,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1597 transitions, 44426 flow, removed 10 selfloop flow, removed 16 redundant places. [2023-01-28 12:12:23,403 INFO L231 Difference]: Finished difference. Result has 667 places, 1471 transitions, 41264 flow [2023-01-28 12:12:23,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=37825, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=41264, PETRI_PLACES=667, PETRI_TRANSITIONS=1471} [2023-01-28 12:12:23,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 646 predicate places. [2023-01-28 12:12:23,411 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1471 transitions, 41264 flow [2023-01-28 12:12:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:23,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:23,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:23,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-01-28 12:12:23,616 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,SelfDestructingSolverStorable45 [2023-01-28 12:12:23,616 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:23,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash 137009307, now seen corresponding path program 19 times [2023-01-28 12:12:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:23,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687470317] [2023-01-28 12:12:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:12:24,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687470317] [2023-01-28 12:12:24,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687470317] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285615042] [2023-01-28 12:12:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:12:24,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:24,270 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) [2023-01-28 12:12:24,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 12:12:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:12:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:24,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:12:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:12:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:12:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:25,318 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:12:25,318 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:12:25,428 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:12:25,428 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 [2023-01-28 12:12:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285615042] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:25,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-28 12:12:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395607445] [2023-01-28 12:12:25,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:12:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:12:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:12:25,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:12:25,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1471 transitions, 41264 flow. Second operand has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 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) [2023-01-28 12:12:25,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:25,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:12:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:12:30,934 INFO L130 PetriNetUnfolder]: 4646/9012 cut-off events. [2023-01-28 12:12:30,934 INFO L131 PetriNetUnfolder]: For 291498/291498 co-relation queries the response was YES. [2023-01-28 12:12:31,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96300 conditions, 9012 events. 4646/9012 cut-off events. For 291498/291498 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 73947 event pairs, 553 based on Foata normal form. 1/9012 useless extension candidates. Maximal degree in co-relation 95828. Up to 8547 conditions per place. [2023-01-28 12:12:31,056 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1374 selfloop transitions, 139 changer transitions 8/1521 dead transitions. [2023-01-28 12:12:31,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1521 transitions, 44543 flow [2023-01-28 12:12:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:12:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:12:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2078 transitions. [2023-01-28 12:12:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26036837489036463 [2023-01-28 12:12:31,058 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2078 transitions. [2023-01-28 12:12:31,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2078 transitions. [2023-01-28 12:12:31,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:31,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2078 transitions. [2023-01-28 12:12:31,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 90.34782608695652) internal successors, (2078), 23 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:31,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:31,062 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:31,062 INFO L175 Difference]: Start difference. First operand has 667 places, 1471 transitions, 41264 flow. Second operand 23 states and 2078 transitions. [2023-01-28 12:12:31,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1521 transitions, 44543 flow [2023-01-28 12:12:34,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1521 transitions, 43500 flow, removed 169 selfloop flow, removed 22 redundant places. [2023-01-28 12:12:34,880 INFO L231 Difference]: Finished difference. Result has 669 places, 1473 transitions, 40581 flow [2023-01-28 12:12:34,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40221, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40581, PETRI_PLACES=669, PETRI_TRANSITIONS=1473} [2023-01-28 12:12:34,882 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 648 predicate places. [2023-01-28 12:12:34,882 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 1473 transitions, 40581 flow [2023-01-28 12:12:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 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) [2023-01-28 12:12:34,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:34,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:34,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-01-28 12:12:35,083 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,SelfDestructingSolverStorable46 [2023-01-28 12:12:35,083 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:35,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash -429871751, now seen corresponding path program 15 times [2023-01-28 12:12:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:35,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160466964] [2023-01-28 12:12:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:35,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160466964] [2023-01-28 12:12:35,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160466964] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638175090] [2023-01-28 12:12:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:12:35,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:35,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:35,268 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) [2023-01-28 12:12:35,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 12:12:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:12:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:12:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:35,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638175090] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:35,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:35,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-28 12:12:35,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603347564] [2023-01-28 12:12:35,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:35,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 12:12:35,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 12:12:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-01-28 12:12:35,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:12:35,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1473 transitions, 40581 flow. Second operand has 15 states, 15 states have (on average 134.0) internal successors, (2010), 15 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:35,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:35,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:12:35,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:12:42,107 INFO L130 PetriNetUnfolder]: 4673/9066 cut-off events. [2023-01-28 12:12:42,107 INFO L131 PetriNetUnfolder]: For 289567/289567 co-relation queries the response was YES. [2023-01-28 12:12:42,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9066 events. 4673/9066 cut-off events. For 289567/289567 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 74691 event pairs, 305 based on Foata normal form. 24/9089 useless extension candidates. Maximal degree in co-relation 95474. Up to 2936 conditions per place. [2023-01-28 12:12:42,227 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 662 selfloop transitions, 939 changer transitions 0/1601 dead transitions. [2023-01-28 12:12:42,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1601 transitions, 45585 flow [2023-01-28 12:12:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 12:12:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 12:12:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3715 transitions. [2023-01-28 12:12:42,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39652043974810547 [2023-01-28 12:12:42,229 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3715 transitions. [2023-01-28 12:12:42,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3715 transitions. [2023-01-28 12:12:42,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:42,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3715 transitions. [2023-01-28 12:12:42,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 137.59259259259258) internal successors, (3715), 27 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:42,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:42,236 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:42,236 INFO L175 Difference]: Start difference. First operand has 669 places, 1473 transitions, 40581 flow. Second operand 27 states and 3715 transitions. [2023-01-28 12:12:42,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1601 transitions, 45585 flow [2023-01-28 12:12:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 1601 transitions, 45287 flow, removed 24 selfloop flow, removed 18 redundant places. [2023-01-28 12:12:45,961 INFO L231 Difference]: Finished difference. Result has 679 places, 1483 transitions, 42377 flow [2023-01-28 12:12:45,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40287, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=931, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=42377, PETRI_PLACES=679, PETRI_TRANSITIONS=1483} [2023-01-28 12:12:45,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 658 predicate places. [2023-01-28 12:12:45,963 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 1483 transitions, 42377 flow [2023-01-28 12:12:45,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.0) internal successors, (2010), 15 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:45,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:45,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:45,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-28 12:12:46,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 12:12:46,170 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:46,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash 155443333, now seen corresponding path program 20 times [2023-01-28 12:12:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:46,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466403496] [2023-01-28 12:12:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:46,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:12:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466403496] [2023-01-28 12:12:46,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466403496] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941001168] [2023-01-28 12:12:46,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:12:46,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:46,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:46,921 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) [2023-01-28 12:12:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 12:12:47,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:12:47,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:47,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:12:47,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:47,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:12:47,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:12:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:12:47,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:48,004 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:12:48,004 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:12:48,121 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:12:48,122 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 [2023-01-28 12:12:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:48,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941001168] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:48,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-28 12:12:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059897433] [2023-01-28 12:12:48,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:12:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:12:48,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:12:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:12:48,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1483 transitions, 42377 flow. Second operand has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 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) [2023-01-28 12:12:48,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:48,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:12:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:12:54,660 INFO L130 PetriNetUnfolder]: 5377/10221 cut-off events. [2023-01-28 12:12:54,661 INFO L131 PetriNetUnfolder]: For 334484/334484 co-relation queries the response was YES. [2023-01-28 12:12:54,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110787 conditions, 10221 events. 5377/10221 cut-off events. For 334484/334484 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 84484 event pairs, 589 based on Foata normal form. 3/10223 useless extension candidates. Maximal degree in co-relation 110263. Up to 8683 conditions per place. [2023-01-28 12:12:54,818 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1447 selfloop transitions, 315 changer transitions 10/1772 dead transitions. [2023-01-28 12:12:54,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1772 transitions, 52117 flow [2023-01-28 12:12:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 12:12:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 12:12:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2729 transitions. [2023-01-28 12:12:54,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2621517771373679 [2023-01-28 12:12:54,827 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2729 transitions. [2023-01-28 12:12:54,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2729 transitions. [2023-01-28 12:12:54,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:54,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2729 transitions. [2023-01-28 12:12:54,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 90.96666666666667) internal successors, (2729), 30 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:54,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:54,834 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:54,834 INFO L175 Difference]: Start difference. First operand has 679 places, 1483 transitions, 42377 flow. Second operand 30 states and 2729 transitions. [2023-01-28 12:12:54,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1772 transitions, 52117 flow [2023-01-28 12:12:59,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1772 transitions, 51256 flow, removed 122 selfloop flow, removed 16 redundant places. [2023-01-28 12:12:59,062 INFO L231 Difference]: Finished difference. Result has 701 places, 1612 transitions, 46772 flow [2023-01-28 12:12:59,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=41636, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=46772, PETRI_PLACES=701, PETRI_TRANSITIONS=1612} [2023-01-28 12:12:59,063 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 680 predicate places. [2023-01-28 12:12:59,063 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 1612 transitions, 46772 flow [2023-01-28 12:12:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 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) [2023-01-28 12:12:59,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:59,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:59,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 12:12:59,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:59,268 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:59,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1526177793, now seen corresponding path program 21 times [2023-01-28 12:12:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214265963] [2023-01-28 12:12:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:12:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214265963] [2023-01-28 12:12:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214265963] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351825063] [2023-01-28 12:12:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:12:59,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:59,745 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:12:59,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 12:12:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:12:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 12:12:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:59,931 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 13 treesize of output 9 [2023-01-28 12:12:59,964 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 [2023-01-28 12:12:59,991 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 [2023-01-28 12:13:00,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:00,244 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 26 [2023-01-28 12:13:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:13:00,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:13:01,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:01,086 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 [2023-01-28 12:13:01,132 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-28 12:13:01,132 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 [2023-01-28 12:13:01,178 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-01-28 12:13:01,179 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 [2023-01-28 12:13:01,287 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-01-28 12:13:01,287 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 [2023-01-28 12:13:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:13:01,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351825063] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:13:01,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:13:01,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-01-28 12:13:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655608240] [2023-01-28 12:13:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:13:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 12:13:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:13:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 12:13:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=794, Unknown=5, NotChecked=0, Total=992 [2023-01-28 12:13:01,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-01-28 12:13:01,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 1612 transitions, 46772 flow. Second operand has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:01,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:13:01,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-01-28 12:13:01,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:13:10,149 INFO L130 PetriNetUnfolder]: 5533/10483 cut-off events. [2023-01-28 12:13:10,149 INFO L131 PetriNetUnfolder]: For 355828/355828 co-relation queries the response was YES. [2023-01-28 12:13:10,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115183 conditions, 10483 events. 5533/10483 cut-off events. For 355828/355828 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 86750 event pairs, 676 based on Foata normal form. 10/10492 useless extension candidates. Maximal degree in co-relation 114598. Up to 10010 conditions per place. [2023-01-28 12:13:10,306 INFO L137 encePairwiseOnDemand]: 334/347 looper letters, 1574 selfloop transitions, 161 changer transitions 23/1758 dead transitions. [2023-01-28 12:13:10,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1758 transitions, 52693 flow [2023-01-28 12:13:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 12:13:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 12:13:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2972 transitions. [2023-01-28 12:13:10,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22539056575155467 [2023-01-28 12:13:10,308 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2972 transitions. [2023-01-28 12:13:10,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2972 transitions. [2023-01-28 12:13:10,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:13:10,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2972 transitions. [2023-01-28 12:13:10,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 78.21052631578948) internal successors, (2972), 38 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:10,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:10,316 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:10,316 INFO L175 Difference]: Start difference. First operand has 701 places, 1612 transitions, 46772 flow. Second operand 38 states and 2972 transitions. [2023-01-28 12:13:10,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1758 transitions, 52693 flow [2023-01-28 12:13:14,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1758 transitions, 52320 flow, removed 72 selfloop flow, removed 21 redundant places. [2023-01-28 12:13:14,828 INFO L231 Difference]: Finished difference. Result has 732 places, 1667 transitions, 48621 flow [2023-01-28 12:13:14,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46400, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=48621, PETRI_PLACES=732, PETRI_TRANSITIONS=1667} [2023-01-28 12:13:14,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 711 predicate places. [2023-01-28 12:13:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 1667 transitions, 48621 flow [2023-01-28 12:13:14,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:14,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:13:14,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:13:14,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 12:13:15,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 12:13:15,034 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:13:15,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:13:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1921224719, now seen corresponding path program 22 times [2023-01-28 12:13:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:13:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861315539] [2023-01-28 12:13:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:13:15,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:13:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:13:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:13:15,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:13:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861315539] [2023-01-28 12:13:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861315539] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:13:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899654262] [2023-01-28 12:13:15,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:13:15,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:13:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:13:15,723 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:13:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 12:13:15,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:13:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:13:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 12:13:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:13:16,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:16,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:13:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:16,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:13:16,568 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:13:16,568 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:13:16,675 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:13:16,676 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 [2023-01-28 12:13:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:16,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899654262] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:13:16,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:13:16,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-01-28 12:13:16,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743374870] [2023-01-28 12:13:16,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:13:16,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 12:13:16,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:13:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 12:13:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-01-28 12:13:16,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:13:16,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 1667 transitions, 48621 flow. Second operand has 27 states, 27 states have (on average 86.74074074074075) internal successors, (2342), 27 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:16,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:13:16,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:13:16,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:13:24,017 INFO L130 PetriNetUnfolder]: 5595/10738 cut-off events. [2023-01-28 12:13:24,018 INFO L131 PetriNetUnfolder]: For 377337/377337 co-relation queries the response was YES. [2023-01-28 12:13:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119067 conditions, 10738 events. 5595/10738 cut-off events. For 377337/377337 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 90494 event pairs, 869 based on Foata normal form. 3/10740 useless extension candidates. Maximal degree in co-relation 118451. Up to 8760 conditions per place. [2023-01-28 12:13:24,194 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1531 selfloop transitions, 355 changer transitions 8/1894 dead transitions. [2023-01-28 12:13:24,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 1894 transitions, 56525 flow [2023-01-28 12:13:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 12:13:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 12:13:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2982 transitions. [2023-01-28 12:13:24,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26041393764736703 [2023-01-28 12:13:24,196 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2982 transitions. [2023-01-28 12:13:24,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2982 transitions. [2023-01-28 12:13:24,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:13:24,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2982 transitions. [2023-01-28 12:13:24,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.36363636363636) internal successors, (2982), 33 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:24,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:24,203 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:24,203 INFO L175 Difference]: Start difference. First operand has 732 places, 1667 transitions, 48621 flow. Second operand 33 states and 2982 transitions. [2023-01-28 12:13:24,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 1894 transitions, 56525 flow [2023-01-28 12:13:29,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1894 transitions, 55885 flow, removed 213 selfloop flow, removed 20 redundant places. [2023-01-28 12:13:29,412 INFO L231 Difference]: Finished difference. Result has 752 places, 1725 transitions, 50944 flow [2023-01-28 12:13:29,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=47989, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=50944, PETRI_PLACES=752, PETRI_TRANSITIONS=1725} [2023-01-28 12:13:29,413 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2023-01-28 12:13:29,413 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 1725 transitions, 50944 flow [2023-01-28 12:13:29,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.74074074074075) internal successors, (2342), 27 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:29,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:13:29,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:13:29,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-28 12:13:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:13:29,618 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:13:29,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:13:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1610738549, now seen corresponding path program 23 times [2023-01-28 12:13:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:13:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071106600] [2023-01-28 12:13:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:13:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:13:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:13:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:13:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:13:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071106600] [2023-01-28 12:13:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071106600] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:13:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017529228] [2023-01-28 12:13:33,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:13:33,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:13:33,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:13:33,446 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:13:33,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 12:13:33,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:13:33,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:13:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 12:13:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:13:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:13:33,811 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 22 treesize of output 22 [2023-01-28 12:13:34,672 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2023-01-28 12:13:34,672 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 39 [2023-01-28 12:13:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:13:34,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:13:36,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:36,102 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 [2023-01-28 12:13:36,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:36,111 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 25 treesize of output 36 [2023-01-28 12:13:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:13:36,197 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:13:36,197 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:13:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017529228] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:13:36,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:13:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-01-28 12:13:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320324919] [2023-01-28 12:13:36,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:13:36,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:13:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:13:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:13:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=952, Unknown=1, NotChecked=0, Total=1056 [2023-01-28 12:13:36,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:13:36,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 1725 transitions, 50944 flow. Second operand has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:36,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:13:36,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:13:36,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:13:47,510 INFO L130 PetriNetUnfolder]: 5806/11159 cut-off events. [2023-01-28 12:13:47,510 INFO L131 PetriNetUnfolder]: For 397161/397161 co-relation queries the response was YES. [2023-01-28 12:13:47,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124735 conditions, 11159 events. 5806/11159 cut-off events. For 397161/397161 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 94878 event pairs, 431 based on Foata normal form. 9/11167 useless extension candidates. Maximal degree in co-relation 124160. Up to 9587 conditions per place. [2023-01-28 12:13:47,692 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1480 selfloop transitions, 427 changer transitions 22/1929 dead transitions. [2023-01-28 12:13:47,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 1929 transitions, 57877 flow [2023-01-28 12:13:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 12:13:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 12:13:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3893 transitions. [2023-01-28 12:13:47,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26090744588164333 [2023-01-28 12:13:47,695 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3893 transitions. [2023-01-28 12:13:47,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3893 transitions. [2023-01-28 12:13:47,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:13:47,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3893 transitions. [2023-01-28 12:13:47,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.53488372093024) internal successors, (3893), 43 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:47,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:47,704 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:47,704 INFO L175 Difference]: Start difference. First operand has 752 places, 1725 transitions, 50944 flow. Second operand 43 states and 3893 transitions. [2023-01-28 12:13:47,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 1929 transitions, 57877 flow [2023-01-28 12:13:53,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1929 transitions, 57396 flow, removed 114 selfloop flow, removed 15 redundant places. [2023-01-28 12:13:53,662 INFO L231 Difference]: Finished difference. Result has 791 places, 1805 transitions, 53798 flow [2023-01-28 12:13:53,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=50467, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=53798, PETRI_PLACES=791, PETRI_TRANSITIONS=1805} [2023-01-28 12:13:53,663 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 770 predicate places. [2023-01-28 12:13:53,663 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 1805 transitions, 53798 flow [2023-01-28 12:13:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:13:53,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:13:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 12:13:53,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-01-28 12:13:53,869 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:13:53,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:13:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1671129951, now seen corresponding path program 24 times [2023-01-28 12:13:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:13:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010074154] [2023-01-28 12:13:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:13:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:13:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:13:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:13:54,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:13:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010074154] [2023-01-28 12:13:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010074154] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:13:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638050655] [2023-01-28 12:13:54,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:13:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:13:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:13:54,655 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:13:54,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 12:13:54,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:13:54,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:13:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:13:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:13:55,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:13:55,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:13:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:13:55,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:13:55,790 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:13:55,790 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:13:55,892 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:13:55,893 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 [2023-01-28 12:13:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638050655] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:13:55,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:13:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:13:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300616041] [2023-01-28 12:13:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:13:55,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:13:55,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:13:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:13:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:13:55,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:13:55,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1805 transitions, 53798 flow. Second operand has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:55,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:13:55,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:13:55,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:14:05,573 INFO L130 PetriNetUnfolder]: 5799/11153 cut-off events. [2023-01-28 12:14:05,573 INFO L131 PetriNetUnfolder]: For 423913/423913 co-relation queries the response was YES. [2023-01-28 12:14:05,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127102 conditions, 11153 events. 5799/11153 cut-off events. For 423913/423913 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 95113 event pairs, 987 based on Foata normal form. 7/11159 useless extension candidates. Maximal degree in co-relation 126670. Up to 10559 conditions per place. [2023-01-28 12:14:05,756 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1676 selfloop transitions, 201 changer transitions 17/1894 dead transitions. [2023-01-28 12:14:05,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 1894 transitions, 58180 flow [2023-01-28 12:14:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 12:14:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 12:14:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3433 transitions. [2023-01-28 12:14:05,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2603518883664493 [2023-01-28 12:14:05,759 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3433 transitions. [2023-01-28 12:14:05,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3433 transitions. [2023-01-28 12:14:05,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:05,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3433 transitions. [2023-01-28 12:14:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 90.34210526315789) internal successors, (3433), 38 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:05,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:05,767 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:05,767 INFO L175 Difference]: Start difference. First operand has 791 places, 1805 transitions, 53798 flow. Second operand 38 states and 3433 transitions. [2023-01-28 12:14:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 1894 transitions, 58180 flow [2023-01-28 12:14:11,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1894 transitions, 57577 flow, removed 164 selfloop flow, removed 24 redundant places. [2023-01-28 12:14:11,780 INFO L231 Difference]: Finished difference. Result has 809 places, 1811 transitions, 53869 flow [2023-01-28 12:14:11,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53136, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=53869, PETRI_PLACES=809, PETRI_TRANSITIONS=1811} [2023-01-28 12:14:11,781 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2023-01-28 12:14:11,781 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 1811 transitions, 53869 flow [2023-01-28 12:14:11,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:11,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:14:11,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:14:11,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 12:14:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:11,987 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:14:11,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:14:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1457871291, now seen corresponding path program 16 times [2023-01-28 12:14:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:14:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511258509] [2023-01-28 12:14:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:14:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:14:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:14:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:14:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511258509] [2023-01-28 12:14:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511258509] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:14:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447284632] [2023-01-28 12:14:12,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:14:12,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:12,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:14:12,161 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:14:12,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 12:14:12,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:14:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:14:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:14:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:14:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:14:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447284632] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:14:12,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:14:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 12:14:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358594367] [2023-01-28 12:14:12,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:14:12,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 12:14:12,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:14:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 12:14:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-01-28 12:14:12,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:14:12,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 1811 transitions, 53869 flow. Second operand has 17 states, 17 states have (on average 134.0) internal successors, (2278), 17 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:12,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:14:12,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:14:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:14:21,038 INFO L130 PetriNetUnfolder]: 5832/11243 cut-off events. [2023-01-28 12:14:21,038 INFO L131 PetriNetUnfolder]: For 430755/430755 co-relation queries the response was YES. [2023-01-28 12:14:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128058 conditions, 11243 events. 5832/11243 cut-off events. For 430755/430755 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 96150 event pairs, 1741 based on Foata normal form. 48/11290 useless extension candidates. Maximal degree in co-relation 127491. Up to 9243 conditions per place. [2023-01-28 12:14:21,241 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1403 selfloop transitions, 490 changer transitions 0/1893 dead transitions. [2023-01-28 12:14:21,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 1893 transitions, 58522 flow [2023-01-28 12:14:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:14:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:14:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3161 transitions. [2023-01-28 12:14:21,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960656559328405 [2023-01-28 12:14:21,243 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3161 transitions. [2023-01-28 12:14:21,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3161 transitions. [2023-01-28 12:14:21,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:21,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3161 transitions. [2023-01-28 12:14:21,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.43478260869566) internal successors, (3161), 23 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:21,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:21,249 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:21,249 INFO L175 Difference]: Start difference. First operand has 809 places, 1811 transitions, 53869 flow. Second operand 23 states and 3161 transitions. [2023-01-28 12:14:21,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 1893 transitions, 58522 flow [2023-01-28 12:14:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 1893 transitions, 58191 flow, removed 56 selfloop flow, removed 29 redundant places. [2023-01-28 12:14:27,743 INFO L231 Difference]: Finished difference. Result has 802 places, 1820 transitions, 54803 flow [2023-01-28 12:14:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53550, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54803, PETRI_PLACES=802, PETRI_TRANSITIONS=1820} [2023-01-28 12:14:27,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 781 predicate places. [2023-01-28 12:14:27,744 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1820 transitions, 54803 flow [2023-01-28 12:14:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.0) internal successors, (2278), 17 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:14:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:14:27,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 12:14:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:27,950 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:14:27,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:14:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1659375279, now seen corresponding path program 17 times [2023-01-28 12:14:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:14:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725589448] [2023-01-28 12:14:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:14:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:14:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:14:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:14:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725589448] [2023-01-28 12:14:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725589448] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:14:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101112815] [2023-01-28 12:14:28,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:14:28,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:28,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:14:28,093 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:14:28,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 12:14:28,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 12:14:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:14:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:14:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:14:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:28,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:14:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:28,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101112815] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:14:28,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:14:28,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-28 12:14:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651740101] [2023-01-28 12:14:28,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:14:28,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 12:14:28,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:14:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 12:14:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-01-28 12:14:28,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:14:28,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1820 transitions, 54803 flow. Second operand has 15 states, 15 states have (on average 133.93333333333334) internal successors, (2009), 15 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:28,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:14:28,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:14:28,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:14:37,684 INFO L130 PetriNetUnfolder]: 5927/11474 cut-off events. [2023-01-28 12:14:37,685 INFO L131 PetriNetUnfolder]: For 439158/439158 co-relation queries the response was YES. [2023-01-28 12:14:37,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131665 conditions, 11474 events. 5927/11474 cut-off events. For 439158/439158 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 99052 event pairs, 1703 based on Foata normal form. 48/11521 useless extension candidates. Maximal degree in co-relation 131098. Up to 9159 conditions per place. [2023-01-28 12:14:37,884 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1418 selfloop transitions, 555 changer transitions 0/1973 dead transitions. [2023-01-28 12:14:37,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1973 transitions, 61142 flow [2023-01-28 12:14:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 12:14:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 12:14:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3993 transitions. [2023-01-28 12:14:37,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39680015899831067 [2023-01-28 12:14:37,886 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3993 transitions. [2023-01-28 12:14:37,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3993 transitions. [2023-01-28 12:14:37,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:37,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3993 transitions. [2023-01-28 12:14:37,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 137.68965517241378) internal successors, (3993), 29 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:37,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:37,893 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:37,893 INFO L175 Difference]: Start difference. First operand has 802 places, 1820 transitions, 54803 flow. Second operand 29 states and 3993 transitions. [2023-01-28 12:14:37,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1973 transitions, 61142 flow [2023-01-28 12:14:44,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 1973 transitions, 60357 flow, removed 69 selfloop flow, removed 15 redundant places. [2023-01-28 12:14:44,138 INFO L231 Difference]: Finished difference. Result has 821 places, 1861 transitions, 56862 flow [2023-01-28 12:14:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53827, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=56862, PETRI_PLACES=821, PETRI_TRANSITIONS=1861} [2023-01-28 12:14:44,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 800 predicate places. [2023-01-28 12:14:44,140 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1861 transitions, 56862 flow [2023-01-28 12:14:44,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.93333333333334) internal successors, (2009), 15 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:44,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:14:44,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:14:44,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 12:14:44,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 12:14:44,345 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:14:44,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:14:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1701277171, now seen corresponding path program 18 times [2023-01-28 12:14:44,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:14:44,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488337335] [2023-01-28 12:14:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:14:44,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:14:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:14:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:44,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:14:44,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488337335] [2023-01-28 12:14:44,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488337335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:14:44,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435425453] [2023-01-28 12:14:44,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:14:44,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:44,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:14:44,479 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:14:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 12:14:44,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:14:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:14:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:14:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:14:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:44,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:14:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435425453] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:14:44,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:14:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-28 12:14:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244726001] [2023-01-28 12:14:44,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:14:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 12:14:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:14:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 12:14:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-01-28 12:14:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:14:44,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1861 transitions, 56862 flow. Second operand has 16 states, 16 states have (on average 134.0) internal successors, (2144), 16 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:44,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:14:44,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:14:44,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:14:54,193 INFO L130 PetriNetUnfolder]: 6280/12112 cut-off events. [2023-01-28 12:14:54,193 INFO L131 PetriNetUnfolder]: For 487959/487959 co-relation queries the response was YES. [2023-01-28 12:14:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140733 conditions, 12112 events. 6280/12112 cut-off events. For 487959/487959 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 105082 event pairs, 497 based on Foata normal form. 48/12159 useless extension candidates. Maximal degree in co-relation 140290. Up to 5388 conditions per place. [2023-01-28 12:14:54,405 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 897 selfloop transitions, 1240 changer transitions 0/2137 dead transitions. [2023-01-28 12:14:54,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2137 transitions, 66690 flow [2023-01-28 12:14:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 12:14:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 12:14:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5106 transitions. [2023-01-28 12:14:54,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976945244956772 [2023-01-28 12:14:54,409 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5106 transitions. [2023-01-28 12:14:54,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5106 transitions. [2023-01-28 12:14:54,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:54,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5106 transitions. [2023-01-28 12:14:54,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 138.0) internal successors, (5106), 37 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:54,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:54,418 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:54,418 INFO L175 Difference]: Start difference. First operand has 821 places, 1861 transitions, 56862 flow. Second operand 37 states and 5106 transitions. [2023-01-28 12:14:54,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2137 transitions, 66690 flow [2023-01-28 12:15:01,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 2137 transitions, 65804 flow, removed 119 selfloop flow, removed 15 redundant places. [2023-01-28 12:15:01,305 INFO L231 Difference]: Finished difference. Result has 851 places, 1988 transitions, 64270 flow [2023-01-28 12:15:01,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=55791, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=64270, PETRI_PLACES=851, PETRI_TRANSITIONS=1988} [2023-01-28 12:15:01,307 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 830 predicate places. [2023-01-28 12:15:01,307 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 1988 transitions, 64270 flow [2023-01-28 12:15:01,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 134.0) internal successors, (2144), 16 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:01,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:15:01,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:15:01,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-01-28 12:15:01,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 12:15:01,512 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:15:01,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:15:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 202869541, now seen corresponding path program 25 times [2023-01-28 12:15:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:15:01,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040474832] [2023-01-28 12:15:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:15:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:15:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:15:02,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:15:02,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040474832] [2023-01-28 12:15:02,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040474832] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:15:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553342221] [2023-01-28 12:15:02,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:15:02,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:15:02,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:15:02,127 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:15:02,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 12:15:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:02,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 12:15:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:15:02,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:15:02,488 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 [2023-01-28 12:15:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:15:02,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:15:03,077 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:15:03,077 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:15:03,190 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:15:03,190 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 [2023-01-28 12:15:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553342221] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:15:03,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:15:03,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2023-01-28 12:15:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106743140] [2023-01-28 12:15:03,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:15:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:15:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:15:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:15:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:15:03,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:15:03,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 1988 transitions, 64270 flow. Second operand has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:03,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:15:03,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:15:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:15:13,223 INFO L130 PetriNetUnfolder]: 6335/12214 cut-off events. [2023-01-28 12:15:13,223 INFO L131 PetriNetUnfolder]: For 540667/540667 co-relation queries the response was YES. [2023-01-28 12:15:13,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148987 conditions, 12214 events. 6335/12214 cut-off events. For 540667/540667 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 105927 event pairs, 843 based on Foata normal form. 5/12218 useless extension candidates. Maximal degree in co-relation 148396. Up to 11770 conditions per place. [2023-01-28 12:15:13,539 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1930 selfloop transitions, 144 changer transitions 11/2085 dead transitions. [2023-01-28 12:15:13,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 2085 transitions, 69627 flow [2023-01-28 12:15:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 12:15:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 12:15:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3024 transitions. [2023-01-28 12:15:13,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28111927117225993 [2023-01-28 12:15:13,542 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3024 transitions. [2023-01-28 12:15:13,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3024 transitions. [2023-01-28 12:15:13,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:15:13,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3024 transitions. [2023-01-28 12:15:13,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.54838709677419) internal successors, (3024), 31 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:13,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:13,548 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:13,548 INFO L175 Difference]: Start difference. First operand has 851 places, 1988 transitions, 64270 flow. Second operand 31 states and 3024 transitions. [2023-01-28 12:15:13,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 2085 transitions, 69627 flow [2023-01-28 12:15:21,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 2085 transitions, 68584 flow, removed 191 selfloop flow, removed 19 redundant places. [2023-01-28 12:15:21,710 INFO L231 Difference]: Finished difference. Result has 872 places, 2008 transitions, 64312 flow [2023-01-28 12:15:21,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63236, PETRI_DIFFERENCE_MINUEND_PLACES=832, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=64312, PETRI_PLACES=872, PETRI_TRANSITIONS=2008} [2023-01-28 12:15:21,711 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-01-28 12:15:21,711 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2008 transitions, 64312 flow [2023-01-28 12:15:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:21,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:15:21,712 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:15:21,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 12:15:21,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-28 12:15:21,917 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:15:21,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:15:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash -542954565, now seen corresponding path program 19 times [2023-01-28 12:15:21,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:15:21,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653056783] [2023-01-28 12:15:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:15:21,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:15:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:15:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653056783] [2023-01-28 12:15:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653056783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:15:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050595993] [2023-01-28 12:15:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:15:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:15:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:15:22,050 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:15:22,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 12:15:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 12:15:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:15:22,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-01-28 12:15:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:22,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:15:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:22,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050595993] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:15:22,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:15:22,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-28 12:15:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140392665] [2023-01-28 12:15:22,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:15:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 12:15:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:15:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 12:15:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-01-28 12:15:22,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-28 12:15:22,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2008 transitions, 64312 flow. Second operand has 16 states, 16 states have (on average 133.75) internal successors, (2140), 16 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:22,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:15:22,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-28 12:15:22,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:15:31,661 INFO L130 PetriNetUnfolder]: 6325/12149 cut-off events. [2023-01-28 12:15:31,661 INFO L131 PetriNetUnfolder]: For 559870/559870 co-relation queries the response was YES. [2023-01-28 12:15:31,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147987 conditions, 12149 events. 6325/12149 cut-off events. For 559870/559870 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105218 event pairs, 494 based on Foata normal form. 12/12160 useless extension candidates. Maximal degree in co-relation 147389. Up to 5407 conditions per place. [2023-01-28 12:15:31,972 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 899 selfloop transitions, 1226 changer transitions 0/2125 dead transitions. [2023-01-28 12:15:31,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2125 transitions, 70310 flow [2023-01-28 12:15:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:15:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:15:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3203 transitions. [2023-01-28 12:15:31,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013281543666207 [2023-01-28 12:15:31,974 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3203 transitions. [2023-01-28 12:15:31,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3203 transitions. [2023-01-28 12:15:31,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:15:31,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3203 transitions. [2023-01-28 12:15:31,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 139.2608695652174) internal successors, (3203), 23 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:31,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:31,980 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:31,980 INFO L175 Difference]: Start difference. First operand has 872 places, 2008 transitions, 64312 flow. Second operand 23 states and 3203 transitions. [2023-01-28 12:15:31,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 2125 transitions, 70310 flow [2023-01-28 12:15:39,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 2125 transitions, 69887 flow, removed 128 selfloop flow, removed 22 redundant places. [2023-01-28 12:15:39,887 INFO L231 Difference]: Finished difference. Result has 872 places, 2012 transitions, 66997 flow [2023-01-28 12:15:39,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63797, PETRI_DIFFERENCE_MINUEND_PLACES=848, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=66997, PETRI_PLACES=872, PETRI_TRANSITIONS=2012} [2023-01-28 12:15:39,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-01-28 12:15:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2012 transitions, 66997 flow [2023-01-28 12:15:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 133.75) internal successors, (2140), 16 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:15:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:15:39,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 12:15:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-28 12:15:40,097 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:15:40,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:15:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1368375569, now seen corresponding path program 26 times [2023-01-28 12:15:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:15:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456559354] [2023-01-28 12:15:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:15:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:15:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:15:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:15:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456559354] [2023-01-28 12:15:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456559354] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:15:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421976486] [2023-01-28 12:15:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:15:41,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:15:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:15:41,041 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:15:41,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 12:15:41,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:15:41,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:15:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 12:15:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:15:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:15:41,349 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 [2023-01-28 12:15:41,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:15:41,515 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 [2023-01-28 12:15:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:15:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:15:42,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:15:42,179 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 [2023-01-28 12:15:42,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:15:42,187 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 [2023-01-28 12:15:42,245 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:15:42,272 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:15:42,272 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:15:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:42,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421976486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:15:42,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:15:42,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2023-01-28 12:15:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099407607] [2023-01-28 12:15:42,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:15:42,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 12:15:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:15:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 12:15:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2023-01-28 12:15:42,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:15:42,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2012 transitions, 66997 flow. Second operand has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:42,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:15:42,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:15:42,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:15:56,293 INFO L130 PetriNetUnfolder]: 6373/12242 cut-off events. [2023-01-28 12:15:56,293 INFO L131 PetriNetUnfolder]: For 584581/584581 co-relation queries the response was YES. [2023-01-28 12:15:56,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154050 conditions, 12242 events. 6373/12242 cut-off events. For 584581/584581 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105862 event pairs, 588 based on Foata normal form. 5/12246 useless extension candidates. Maximal degree in co-relation 153448. Up to 10870 conditions per place. [2023-01-28 12:15:56,509 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1736 selfloop transitions, 387 changer transitions 13/2136 dead transitions. [2023-01-28 12:15:56,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 909 places, 2136 transitions, 72613 flow [2023-01-28 12:15:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 12:15:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 12:15:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3457 transitions. [2023-01-28 12:15:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2621720006067041 [2023-01-28 12:15:56,511 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3457 transitions. [2023-01-28 12:15:56,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3457 transitions. [2023-01-28 12:15:56,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:15:56,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3457 transitions. [2023-01-28 12:15:56,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 90.97368421052632) internal successors, (3457), 38 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:56,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:56,519 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:56,519 INFO L175 Difference]: Start difference. First operand has 872 places, 2012 transitions, 66997 flow. Second operand 38 states and 3457 transitions. [2023-01-28 12:15:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 909 places, 2136 transitions, 72613 flow [2023-01-28 12:16:04,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 896 places, 2136 transitions, 71903 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-01-28 12:16:05,057 INFO L231 Difference]: Finished difference. Result has 902 places, 2025 transitions, 67649 flow [2023-01-28 12:16:05,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66299, PETRI_DIFFERENCE_MINUEND_PLACES=859, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=67649, PETRI_PLACES=902, PETRI_TRANSITIONS=2025} [2023-01-28 12:16:05,058 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 881 predicate places. [2023-01-28 12:16:05,058 INFO L495 AbstractCegarLoop]: Abstraction has has 902 places, 2025 transitions, 67649 flow [2023-01-28 12:16:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:16:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:16:05,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 12:16:05,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-28 12:16:05,264 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:16:05,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:16:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1059376025, now seen corresponding path program 27 times [2023-01-28 12:16:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:16:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908881640] [2023-01-28 12:16:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:16:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:16:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:16:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:16:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:16:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908881640] [2023-01-28 12:16:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908881640] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:16:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094597239] [2023-01-28 12:16:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:16:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:16:06,148 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:16:06,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 12:16:06,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:16:06,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:16:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 12:16:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:16:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:16:06,471 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 [2023-01-28 12:16:06,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:06,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:16:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:16:06,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:16:07,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:07,367 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 [2023-01-28 12:16:07,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:07,382 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 [2023-01-28 12:16:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:16:07,494 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:16:07,494 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:16:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094597239] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:16:07,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:16:07,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-01-28 12:16:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472420159] [2023-01-28 12:16:07,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:16:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:16:07,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:16:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:16:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=920, Unknown=1, NotChecked=0, Total=1056 [2023-01-28 12:16:07,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 347 [2023-01-28 12:16:07,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 2025 transitions, 67649 flow. Second operand has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:07,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:16:07,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 347 [2023-01-28 12:16:07,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:16:24,448 INFO L130 PetriNetUnfolder]: 6362/12213 cut-off events. [2023-01-28 12:16:24,448 INFO L131 PetriNetUnfolder]: For 598513/598513 co-relation queries the response was YES. [2023-01-28 12:16:24,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154822 conditions, 12213 events. 6362/12213 cut-off events. For 598513/598513 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 105457 event pairs, 617 based on Foata normal form. 6/12218 useless extension candidates. Maximal degree in co-relation 154208. Up to 10960 conditions per place. [2023-01-28 12:16:24,668 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1744 selfloop transitions, 360 changer transitions 15/2119 dead transitions. [2023-01-28 12:16:24,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 2119 transitions, 72829 flow [2023-01-28 12:16:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 12:16:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 12:16:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3089 transitions. [2023-01-28 12:16:24,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697580997292813 [2023-01-28 12:16:24,670 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3089 transitions. [2023-01-28 12:16:24,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3089 transitions. [2023-01-28 12:16:24,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:16:24,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3089 transitions. [2023-01-28 12:16:24,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 93.60606060606061) internal successors, (3089), 33 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:24,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:24,677 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:24,677 INFO L175 Difference]: Start difference. First operand has 902 places, 2025 transitions, 67649 flow. Second operand 33 states and 3089 transitions. [2023-01-28 12:16:24,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 2119 transitions, 72829 flow [2023-01-28 12:16:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 2119 transitions, 71894 flow, removed 101 selfloop flow, removed 36 redundant places. [2023-01-28 12:16:33,790 INFO L231 Difference]: Finished difference. Result has 903 places, 2034 transitions, 67880 flow [2023-01-28 12:16:33,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66651, PETRI_DIFFERENCE_MINUEND_PLACES=866, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=67880, PETRI_PLACES=903, PETRI_TRANSITIONS=2034} [2023-01-28 12:16:33,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 882 predicate places. [2023-01-28 12:16:33,791 INFO L495 AbstractCegarLoop]: Abstraction has has 903 places, 2034 transitions, 67880 flow [2023-01-28 12:16:33,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:33,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:16:33,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:16:33,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-28 12:16:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 12:16:33,997 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:16:33,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:16:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1095038279, now seen corresponding path program 28 times [2023-01-28 12:16:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:16:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530013364] [2023-01-28 12:16:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:16:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:16:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:16:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:16:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:16:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530013364] [2023-01-28 12:16:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530013364] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:16:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553393629] [2023-01-28 12:16:34,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:16:34,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:16:34,819 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:16:34,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 12:16:34,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:16:34,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:16:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 12:16:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:16:35,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:16:35,071 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 [2023-01-28 12:16:35,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:35,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:16:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:16:35,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:16:36,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:36,000 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 [2023-01-28 12:16:36,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:36,011 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 [2023-01-28 12:16:36,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:16:36,089 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:16:36,089 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:16:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:36,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553393629] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:16:36,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:16:36,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-01-28 12:16:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761190919] [2023-01-28 12:16:36,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:16:36,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:16:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:16:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:16:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=921, Unknown=1, NotChecked=0, Total=1056 [2023-01-28 12:16:36,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:16:36,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 903 places, 2034 transitions, 67880 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:36,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:16:36,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:16:36,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:16:46,371 INFO L130 PetriNetUnfolder]: 6416/12293 cut-off events. [2023-01-28 12:16:46,372 INFO L131 PetriNetUnfolder]: For 588857/588857 co-relation queries the response was YES. [2023-01-28 12:16:46,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155049 conditions, 12293 events. 6416/12293 cut-off events. For 588857/588857 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 105867 event pairs, 799 based on Foata normal form. 6/12298 useless extension candidates. Maximal degree in co-relation 154442. Up to 11706 conditions per place. [2023-01-28 12:16:46,573 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1911 selfloop transitions, 206 changer transitions 11/2128 dead transitions. [2023-01-28 12:16:46,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 2128 transitions, 73595 flow [2023-01-28 12:16:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 12:16:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 12:16:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2023-01-28 12:16:46,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25919647397864043 [2023-01-28 12:16:46,577 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2023-01-28 12:16:46,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2023-01-28 12:16:46,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:16:46,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2023-01-28 12:16:46,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:46,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:46,583 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:46,583 INFO L175 Difference]: Start difference. First operand has 903 places, 2034 transitions, 67880 flow. Second operand 34 states and 3058 transitions. [2023-01-28 12:16:46,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 2128 transitions, 73595 flow [2023-01-28 12:16:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 2128 transitions, 73036 flow, removed 61 selfloop flow, removed 27 redundant places. [2023-01-28 12:16:54,936 INFO L231 Difference]: Finished difference. Result has 914 places, 2060 transitions, 68944 flow [2023-01-28 12:16:54,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=67299, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=68944, PETRI_PLACES=914, PETRI_TRANSITIONS=2060} [2023-01-28 12:16:54,938 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 893 predicate places. [2023-01-28 12:16:54,938 INFO L495 AbstractCegarLoop]: Abstraction has has 914 places, 2060 transitions, 68944 flow [2023-01-28 12:16:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:54,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:16:54,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:16:54,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 12:16:55,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:55,144 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:16:55,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:16:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1094443633, now seen corresponding path program 29 times [2023-01-28 12:16:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:16:55,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770110232] [2023-01-28 12:16:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:16:55,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:16:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:16:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:16:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:16:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770110232] [2023-01-28 12:16:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770110232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:16:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569030927] [2023-01-28 12:16:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:16:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:16:56,022 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:16:56,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 12:16:56,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 12:16:56,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:16:56,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 12:16:56,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:16:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:16:56,299 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 [2023-01-28 12:16:56,799 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-01-28 12:16:56,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 188 [2023-01-28 12:16:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:16:58,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:16:59,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:59,177 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 [2023-01-28 12:16:59,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:16:59,193 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 [2023-01-28 12:16:59,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:16:59,305 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-28 12:16:59,305 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-28 12:16:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:59,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569030927] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:16:59,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:16:59,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-01-28 12:16:59,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752413397] [2023-01-28 12:16:59,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:16:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:16:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:16:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:16:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=938, Unknown=2, NotChecked=0, Total=1056 [2023-01-28 12:16:59,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:16:59,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 2060 transitions, 68944 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:59,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:16:59,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:16:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:17:10,369 INFO L130 PetriNetUnfolder]: 6414/12280 cut-off events. [2023-01-28 12:17:10,369 INFO L131 PetriNetUnfolder]: For 589573/589573 co-relation queries the response was YES. [2023-01-28 12:17:10,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155432 conditions, 12280 events. 6414/12280 cut-off events. For 589573/589573 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 105443 event pairs, 805 based on Foata normal form. 1/12280 useless extension candidates. Maximal degree in co-relation 154820. Up to 11803 conditions per place. [2023-01-28 12:17:10,605 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1901 selfloop transitions, 199 changer transitions 6/2106 dead transitions. [2023-01-28 12:17:10,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 2106 transitions, 73434 flow [2023-01-28 12:17:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 12:17:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 12:17:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2774 transitions. [2023-01-28 12:17:10,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25787859068513524 [2023-01-28 12:17:10,607 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2774 transitions. [2023-01-28 12:17:10,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2774 transitions. [2023-01-28 12:17:10,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:17:10,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2774 transitions. [2023-01-28 12:17:10,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.48387096774194) internal successors, (2774), 31 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:10,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:10,613 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:10,614 INFO L175 Difference]: Start difference. First operand has 914 places, 2060 transitions, 68944 flow. Second operand 31 states and 2774 transitions. [2023-01-28 12:17:10,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 942 places, 2106 transitions, 73434 flow [2023-01-28 12:17:19,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2106 transitions, 72994 flow, removed 121 selfloop flow, removed 24 redundant places. [2023-01-28 12:17:19,771 INFO L231 Difference]: Finished difference. Result has 921 places, 2062 transitions, 69009 flow [2023-01-28 12:17:19,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68504, PETRI_DIFFERENCE_MINUEND_PLACES=888, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69009, PETRI_PLACES=921, PETRI_TRANSITIONS=2062} [2023-01-28 12:17:19,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 900 predicate places. [2023-01-28 12:17:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 2062 transitions, 69009 flow [2023-01-28 12:17:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:17:19,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:17:19,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-01-28 12:17:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:17:19,978 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:17:19,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:17:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash -788944561, now seen corresponding path program 30 times [2023-01-28 12:17:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:17:19,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402294986] [2023-01-28 12:17:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:17:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:17:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:17:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:17:20,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:17:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402294986] [2023-01-28 12:17:20,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402294986] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:17:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847502097] [2023-01-28 12:17:20,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:17:20,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:17:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:17:20,662 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:17:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 12:17:20,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 12:17:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:17:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 12:17:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:17:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:17:20,932 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 [2023-01-28 12:17:21,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:21,074 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 [2023-01-28 12:17:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:17:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:17:21,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:21,717 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 195 [2023-01-28 12:17:21,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:21,742 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 51 treesize of output 95 [2023-01-28 12:17:22,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:22,033 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 [2023-01-28 12:17:22,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:22,046 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 [2023-01-28 12:17:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:17:22,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847502097] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:17:22,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:17:22,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-01-28 12:17:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988044633] [2023-01-28 12:17:22,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:17:22,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 12:17:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:17:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 12:17:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=931, Unknown=1, NotChecked=0, Total=1056 [2023-01-28 12:17:22,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:17:22,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 2062 transitions, 69009 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:22,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:17:22,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:17:22,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:17:32,740 INFO L130 PetriNetUnfolder]: 6414/12285 cut-off events. [2023-01-28 12:17:32,740 INFO L131 PetriNetUnfolder]: For 584111/584111 co-relation queries the response was YES. [2023-01-28 12:17:32,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155280 conditions, 12285 events. 6414/12285 cut-off events. For 584111/584111 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 105627 event pairs, 832 based on Foata normal form. 4/12288 useless extension candidates. Maximal degree in co-relation 154665. Up to 11696 conditions per place. [2023-01-28 12:17:32,940 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1905 selfloop transitions, 218 changer transitions 13/2136 dead transitions. [2023-01-28 12:17:32,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 2136 transitions, 73741 flow [2023-01-28 12:17:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 12:17:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 12:17:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3152 transitions. [2023-01-28 12:17:32,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25953067105804856 [2023-01-28 12:17:32,943 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3152 transitions. [2023-01-28 12:17:32,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3152 transitions. [2023-01-28 12:17:32,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:17:32,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3152 transitions. [2023-01-28 12:17:32,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.05714285714286) internal successors, (3152), 35 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:32,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:32,949 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:32,949 INFO L175 Difference]: Start difference. First operand has 921 places, 2062 transitions, 69009 flow. Second operand 35 states and 3152 transitions. [2023-01-28 12:17:32,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 2136 transitions, 73741 flow [2023-01-28 12:17:41,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 928 places, 2136 transitions, 73378 flow, removed 24 selfloop flow, removed 26 redundant places. [2023-01-28 12:17:41,352 INFO L231 Difference]: Finished difference. Result has 931 places, 2060 transitions, 69084 flow [2023-01-28 12:17:41,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68646, PETRI_DIFFERENCE_MINUEND_PLACES=894, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=69084, PETRI_PLACES=931, PETRI_TRANSITIONS=2060} [2023-01-28 12:17:41,353 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 910 predicate places. [2023-01-28 12:17:41,353 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 2060 transitions, 69084 flow [2023-01-28 12:17:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:41,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:17:41,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:17:41,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 12:17:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:17:41,559 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:17:41,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:17:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1095631957, now seen corresponding path program 31 times [2023-01-28 12:17:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:17:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727144896] [2023-01-28 12:17:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:17:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:17:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:17:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:17:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:17:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727144896] [2023-01-28 12:17:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727144896] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:17:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019529084] [2023-01-28 12:17:42,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:17:42,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:17:42,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:17:42,661 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:17:42,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 12:17:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:17:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 12:17:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:17:42,872 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 [2023-01-28 12:17:42,913 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 [2023-01-28 12:17:42,950 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 [2023-01-28 12:17:43,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:43,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-01-28 12:17:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:17:43,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:17:44,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:17:44,088 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 380 treesize of output 224 [2023-01-28 12:17:44,226 INFO L321 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-01-28 12:17:44,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 570 treesize of output 637 [2023-01-28 12:17:44,381 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-01-28 12:17:44,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 458 treesize of output 466 [2023-01-28 12:17:44,577 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-01-28 12:17:44,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 185 treesize of output 277 [2023-01-28 12:17:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:17:48,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019529084] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:17:48,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:17:48,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 12:17:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245187081] [2023-01-28 12:17:48,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:17:48,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 12:17:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:17:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 12:17:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1054, Unknown=2, NotChecked=0, Total=1260 [2023-01-28 12:17:48,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:17:48,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 2060 transitions, 69084 flow. Second operand has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:17:48,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:17:48,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:17:48,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:17:49,868 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x1~0 4) c_~f~0.offset))) (and (let ((.cse2 (select |c_#memory_int| c_~f~0.base))) (let ((.cse1 (select .cse2 (+ (* (select .cse2 .cse4) 4) c_~f~0.offset))) (.cse0 (select .cse2 (+ c_~f~0.offset (* (select .cse2 .cse3) 4))))) (or (<= c_~size~0 .cse0) (< .cse0 0) (< .cse1 0) (<= c_~size~0 .cse1) (= (select .cse2 (+ c_~f~0.offset (* 4 .cse1))) (select .cse2 (+ c_~f~0.offset (* .cse0 4))))))) (forall ((v_ArrVal_2031 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2031) c_~f~0.base))) (let ((.cse5 (select .cse6 (+ (* 4 (select .cse6 .cse3)) c_~f~0.offset))) (.cse7 (select .cse6 (+ (* (select .cse6 .cse4) 4) c_~f~0.offset)))) (or (<= c_~size~0 .cse5) (< .cse5 0) (= (select .cse6 (+ c_~f~0.offset (* .cse7 4))) (select .cse6 (+ c_~f~0.offset (* .cse5 4)))) (< .cse7 0) (<= c_~size~0 .cse7))))))) is different from false [2023-01-28 12:18:10,305 INFO L130 PetriNetUnfolder]: 7181/13656 cut-off events. [2023-01-28 12:18:10,305 INFO L131 PetriNetUnfolder]: For 669732/669732 co-relation queries the response was YES. [2023-01-28 12:18:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174625 conditions, 13656 events. 7181/13656 cut-off events. For 669732/669732 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 118785 event pairs, 141 based on Foata normal form. 5/13660 useless extension candidates. Maximal degree in co-relation 174010. Up to 9250 conditions per place. [2023-01-28 12:18:10,574 INFO L137 encePairwiseOnDemand]: 334/347 looper letters, 1608 selfloop transitions, 931 changer transitions 23/2562 dead transitions. [2023-01-28 12:18:10,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 2562 transitions, 85978 flow [2023-01-28 12:18:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-01-28 12:18:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-01-28 12:18:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 7383 transitions. [2023-01-28 12:18:10,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2594714275673016 [2023-01-28 12:18:10,579 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 7383 transitions. [2023-01-28 12:18:10,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 7383 transitions. [2023-01-28 12:18:10,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:18:10,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 7383 transitions. [2023-01-28 12:18:10,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 90.03658536585365) internal successors, (7383), 82 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:10,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 347.0) internal successors, (28801), 83 states have internal predecessors, (28801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:10,595 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 347.0) internal successors, (28801), 83 states have internal predecessors, (28801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:10,595 INFO L175 Difference]: Start difference. First operand has 931 places, 2060 transitions, 69084 flow. Second operand 82 states and 7383 transitions. [2023-01-28 12:18:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 2562 transitions, 85978 flow [2023-01-28 12:18:20,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 978 places, 2562 transitions, 85464 flow, removed 28 selfloop flow, removed 32 redundant places. [2023-01-28 12:18:20,528 INFO L231 Difference]: Finished difference. Result has 1008 places, 2357 transitions, 82188 flow [2023-01-28 12:18:20,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68632, PETRI_DIFFERENCE_MINUEND_PLACES=897, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=82188, PETRI_PLACES=1008, PETRI_TRANSITIONS=2357} [2023-01-28 12:18:20,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 987 predicate places. [2023-01-28 12:18:20,529 INFO L495 AbstractCegarLoop]: Abstraction has has 1008 places, 2357 transitions, 82188 flow [2023-01-28 12:18:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:20,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:18:20,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:18:20,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 12:18:20,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:18:20,735 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:18:20,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:18:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -699103046, now seen corresponding path program 32 times [2023-01-28 12:18:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:18:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174968480] [2023-01-28 12:18:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:18:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:18:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:18:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:18:21,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:18:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174968480] [2023-01-28 12:18:21,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174968480] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:18:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140650750] [2023-01-28 12:18:21,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:18:21,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:18:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:18:21,735 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:18:21,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 12:18:21,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:18:21,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:18:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 12:18:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:18:22,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:18:22,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-28 12:18:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:18:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:18:22,751 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:18:22,752 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:18:22,887 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:18:22,887 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 [2023-01-28 12:18:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 12:18:23,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140650750] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:18:23,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:18:23,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 29 [2023-01-28 12:18:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784923857] [2023-01-28 12:18:23,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:18:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 12:18:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:18:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 12:18:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-01-28 12:18:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:18:23,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1008 places, 2357 transitions, 82188 flow. Second operand has 31 states, 31 states have (on average 86.61290322580645) internal successors, (2685), 31 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:23,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:18:23,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:18:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:18:34,605 INFO L130 PetriNetUnfolder]: 7317/13877 cut-off events. [2023-01-28 12:18:34,605 INFO L131 PetriNetUnfolder]: For 776813/776813 co-relation queries the response was YES. [2023-01-28 12:18:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188462 conditions, 13877 events. 7317/13877 cut-off events. For 776813/776813 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 119970 event pairs, 981 based on Foata normal form. 10/13885 useless extension candidates. Maximal degree in co-relation 188118. Up to 13329 conditions per place. [2023-01-28 12:18:34,861 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 2302 selfloop transitions, 202 changer transitions 13/2517 dead transitions. [2023-01-28 12:18:34,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 2517 transitions, 90644 flow [2023-01-28 12:18:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 12:18:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 12:18:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3081 transitions. [2023-01-28 12:18:34,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26114595694185455 [2023-01-28 12:18:34,863 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3081 transitions. [2023-01-28 12:18:34,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3081 transitions. [2023-01-28 12:18:34,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:18:34,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3081 transitions. [2023-01-28 12:18:34,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.61764705882354) internal successors, (3081), 34 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:34,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:34,870 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:34,870 INFO L175 Difference]: Start difference. First operand has 1008 places, 2357 transitions, 82188 flow. Second operand 34 states and 3081 transitions. [2023-01-28 12:18:34,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 2517 transitions, 90644 flow [2023-01-28 12:18:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1007 places, 2517 transitions, 89153 flow, removed 487 selfloop flow, removed 30 redundant places. [2023-01-28 12:18:47,270 INFO L231 Difference]: Finished difference. Result has 1018 places, 2427 transitions, 84020 flow [2023-01-28 12:18:47,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=80608, PETRI_DIFFERENCE_MINUEND_PLACES=974, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=84020, PETRI_PLACES=1018, PETRI_TRANSITIONS=2427} [2023-01-28 12:18:47,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 997 predicate places. [2023-01-28 12:18:47,271 INFO L495 AbstractCegarLoop]: Abstraction has has 1018 places, 2427 transitions, 84020 flow [2023-01-28 12:18:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 86.61290322580645) internal successors, (2685), 31 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:47,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:18:47,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:18:47,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-28 12:18:47,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-28 12:18:47,477 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:18:47,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:18:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1515975776, now seen corresponding path program 33 times [2023-01-28 12:18:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:18:47,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276478190] [2023-01-28 12:18:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:18:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:18:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:18:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 12:18:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:18:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276478190] [2023-01-28 12:18:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276478190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:18:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561975202] [2023-01-28 12:18:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:18:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:18:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:18:47,721 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:18:47,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 12:18:47,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:18:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:18:47,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 12:18:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:18:48,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:18:48,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-28 12:18:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 12:18:48,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:18:48,633 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:18:48,633 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-28 12:18:48,764 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-28 12:18:48,764 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 [2023-01-28 12:18:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 12:18:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561975202] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:18:48,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:18:48,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2023-01-28 12:18:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602554603] [2023-01-28 12:18:48,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:18:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 12:18:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:18:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 12:18:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-01-28 12:18:48,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-28 12:18:48,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1018 places, 2427 transitions, 84020 flow. Second operand has 22 states, 22 states have (on average 106.77272727272727) internal successors, (2349), 22 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:48,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:18:48,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-28 12:18:48,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:18:59,319 INFO L130 PetriNetUnfolder]: 7313/13854 cut-off events. [2023-01-28 12:18:59,319 INFO L131 PetriNetUnfolder]: For 751079/751079 co-relation queries the response was YES. [2023-01-28 12:18:59,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185824 conditions, 13854 events. 7313/13854 cut-off events. For 751079/751079 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 119720 event pairs, 942 based on Foata normal form. 1/13853 useless extension candidates. Maximal degree in co-relation 185169. Up to 13253 conditions per place. [2023-01-28 12:18:59,570 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 2282 selfloop transitions, 168 changer transitions 5/2455 dead transitions. [2023-01-28 12:18:59,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1029 places, 2455 transitions, 89097 flow [2023-01-28 12:18:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 12:18:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 12:18:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1652 transitions. [2023-01-28 12:18:59,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31738712776176753 [2023-01-28 12:18:59,571 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1652 transitions. [2023-01-28 12:18:59,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1652 transitions. [2023-01-28 12:18:59,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:18:59,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1652 transitions. [2023-01-28 12:18:59,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.13333333333334) internal successors, (1652), 15 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:59,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:59,575 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:18:59,575 INFO L175 Difference]: Start difference. First operand has 1018 places, 2427 transitions, 84020 flow. Second operand 15 states and 1652 transitions. [2023-01-28 12:18:59,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1029 places, 2455 transitions, 89097 flow [2023-01-28 12:19:11,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 2455 transitions, 88552 flow, removed 188 selfloop flow, removed 14 redundant places. [2023-01-28 12:19:11,655 INFO L231 Difference]: Finished difference. Result has 1017 places, 2428 transitions, 83867 flow [2023-01-28 12:19:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=83475, PETRI_DIFFERENCE_MINUEND_PLACES=1001, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=83867, PETRI_PLACES=1017, PETRI_TRANSITIONS=2428} [2023-01-28 12:19:11,656 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 996 predicate places. [2023-01-28 12:19:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 1017 places, 2428 transitions, 83867 flow [2023-01-28 12:19:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 106.77272727272727) internal successors, (2349), 22 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:11,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:19:11,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:19:11,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 12:19:11,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-01-28 12:19:11,862 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:19:11,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:19:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1209929323, now seen corresponding path program 34 times [2023-01-28 12:19:11,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:19:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889596691] [2023-01-28 12:19:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:19:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:19:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:19:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:19:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:19:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889596691] [2023-01-28 12:19:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889596691] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:19:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999231532] [2023-01-28 12:19:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:19:12,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:19:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:19:12,842 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:19:12,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 12:19:12,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:19:12,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:19:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 12:19:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:19:13,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:19:13,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2023-01-28 12:19:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:19:13,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:19:13,790 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:19:13,790 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 122 [2023-01-28 12:19:13,985 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:19:13,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-01-28 12:19:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:19:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999231532] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:19:14,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:19:14,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:19:14,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678639369] [2023-01-28 12:19:14,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:19:14,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:19:14,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:19:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:19:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:19:14,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:19:14,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1017 places, 2428 transitions, 83867 flow. Second operand has 29 states, 29 states have (on average 86.89655172413794) internal successors, (2520), 29 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:14,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:19:14,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:19:14,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:19:28,781 INFO L130 PetriNetUnfolder]: 7821/14763 cut-off events. [2023-01-28 12:19:28,782 INFO L131 PetriNetUnfolder]: For 816541/816541 co-relation queries the response was YES. [2023-01-28 12:19:28,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197779 conditions, 14763 events. 7821/14763 cut-off events. For 816541/816541 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 129000 event pairs, 699 based on Foata normal form. 8/14770 useless extension candidates. Maximal degree in co-relation 197121. Up to 12183 conditions per place. [2023-01-28 12:19:29,048 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 2077 selfloop transitions, 684 changer transitions 17/2778 dead transitions. [2023-01-28 12:19:29,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1061 places, 2778 transitions, 97338 flow [2023-01-28 12:19:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 12:19:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 12:19:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4201 transitions. [2023-01-28 12:19:29,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2631875704798897 [2023-01-28 12:19:29,051 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4201 transitions. [2023-01-28 12:19:29,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4201 transitions. [2023-01-28 12:19:29,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:19:29,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4201 transitions. [2023-01-28 12:19:29,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 91.32608695652173) internal successors, (4201), 46 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:29,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 347.0) internal successors, (16309), 47 states have internal predecessors, (16309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:29,060 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 347.0) internal successors, (16309), 47 states have internal predecessors, (16309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:29,060 INFO L175 Difference]: Start difference. First operand has 1017 places, 2428 transitions, 83867 flow. Second operand 46 states and 4201 transitions. [2023-01-28 12:19:29,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1061 places, 2778 transitions, 97338 flow [2023-01-28 12:19:42,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1049 places, 2778 transitions, 96950 flow, removed 25 selfloop flow, removed 12 redundant places. [2023-01-28 12:19:42,506 INFO L231 Difference]: Finished difference. Result has 1060 places, 2584 transitions, 90855 flow [2023-01-28 12:19:42,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=83483, PETRI_DIFFERENCE_MINUEND_PLACES=1004, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=90855, PETRI_PLACES=1060, PETRI_TRANSITIONS=2584} [2023-01-28 12:19:42,508 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1039 predicate places. [2023-01-28 12:19:42,508 INFO L495 AbstractCegarLoop]: Abstraction has has 1060 places, 2584 transitions, 90855 flow [2023-01-28 12:19:42,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.89655172413794) internal successors, (2520), 29 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:19:42,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:19:42,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:19:42,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-28 12:19:42,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:19:42,714 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:19:42,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:19:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1950070276, now seen corresponding path program 35 times [2023-01-28 12:19:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:19:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907254455] [2023-01-28 12:19:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:19:42,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:19:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:19:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:19:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:19:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907254455] [2023-01-28 12:19:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907254455] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:19:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744332003] [2023-01-28 12:19:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:19:42,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:19:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:19:42,880 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:19:42,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 12:19:43,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:19:43,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:19:43,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 12:19:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:19:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:19:43,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:20:22,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:20:22,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 334 treesize of output 302 [2023-01-28 12:20:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:20:23,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744332003] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:20:23,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:20:23,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 28 [2023-01-28 12:20:23,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066070025] [2023-01-28 12:20:23,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:20:23,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:20:23,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:20:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:20:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:20:23,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 347 [2023-01-28 12:20:23,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1060 places, 2584 transitions, 90855 flow. Second operand has 28 states, 28 states have (on average 81.75) internal successors, (2289), 28 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:20:23,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:20:23,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 347 [2023-01-28 12:20:23,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:20:50,443 INFO L130 PetriNetUnfolder]: 7910/15047 cut-off events. [2023-01-28 12:20:50,443 INFO L131 PetriNetUnfolder]: For 852067/852067 co-relation queries the response was YES. [2023-01-28 12:20:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204475 conditions, 15047 events. 7910/15047 cut-off events. For 852067/852067 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 132731 event pairs, 431 based on Foata normal form. 24/15070 useless extension candidates. Maximal degree in co-relation 203806. Up to 3894 conditions per place. [2023-01-28 12:20:50,735 INFO L137 encePairwiseOnDemand]: 334/347 looper letters, 1119 selfloop transitions, 1702 changer transitions 43/2864 dead transitions. [2023-01-28 12:20:50,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1122 places, 2864 transitions, 101272 flow [2023-01-28 12:20:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-01-28 12:20:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-01-28 12:20:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5385 transitions. [2023-01-28 12:20:50,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24632907918210512 [2023-01-28 12:20:50,739 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5385 transitions. [2023-01-28 12:20:50,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5385 transitions. [2023-01-28 12:20:50,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:20:50,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5385 transitions. [2023-01-28 12:20:50,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 85.47619047619048) internal successors, (5385), 63 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:20:50,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 347.0) internal successors, (22208), 64 states have internal predecessors, (22208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:20:50,751 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 347.0) internal successors, (22208), 64 states have internal predecessors, (22208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:20:50,751 INFO L175 Difference]: Start difference. First operand has 1060 places, 2584 transitions, 90855 flow. Second operand 63 states and 5385 transitions. [2023-01-28 12:20:50,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1122 places, 2864 transitions, 101272 flow [2023-01-28 12:21:05,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1096 places, 2864 transitions, 99727 flow, removed 511 selfloop flow, removed 26 redundant places. [2023-01-28 12:21:05,977 INFO L231 Difference]: Finished difference. Result has 1109 places, 2627 transitions, 95661 flow [2023-01-28 12:21:05,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=88905, PETRI_DIFFERENCE_MINUEND_PLACES=1034, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=95661, PETRI_PLACES=1109, PETRI_TRANSITIONS=2627} [2023-01-28 12:21:05,978 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1088 predicate places. [2023-01-28 12:21:05,978 INFO L495 AbstractCegarLoop]: Abstraction has has 1109 places, 2627 transitions, 95661 flow [2023-01-28 12:21:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 81.75) internal successors, (2289), 28 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:05,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:21:05,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:21:05,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-28 12:21:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:21:06,184 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:21:06,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:21:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash 527098231, now seen corresponding path program 36 times [2023-01-28 12:21:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:21:06,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8219078] [2023-01-28 12:21:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:21:06,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:21:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:21:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:21:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:21:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8219078] [2023-01-28 12:21:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8219078] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:21:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534480234] [2023-01-28 12:21:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:21:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:21:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:21:07,309 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:21:07,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 12:21:07,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:21:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:21:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 12:21:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:21:07,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:21:07,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2023-01-28 12:21:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:21:07,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:21:08,281 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:21:08,281 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 122 [2023-01-28 12:21:08,450 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:21:08,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-01-28 12:21:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:21:08,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534480234] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:21:08,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:21:08,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-28 12:21:08,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173306772] [2023-01-28 12:21:08,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:21:08,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 12:21:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:21:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 12:21:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-01-28 12:21:08,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-28 12:21:08,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1109 places, 2627 transitions, 95661 flow. Second operand has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:08,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:21:08,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-28 12:21:08,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:21:29,059 INFO L130 PetriNetUnfolder]: 8206/15599 cut-off events. [2023-01-28 12:21:29,059 INFO L131 PetriNetUnfolder]: For 957453/957453 co-relation queries the response was YES. [2023-01-28 12:21:29,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219383 conditions, 15599 events. 8206/15599 cut-off events. For 957453/957453 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 138475 event pairs, 122 based on Foata normal form. 6/15604 useless extension candidates. Maximal degree in co-relation 218683. Up to 10143 conditions per place. [2023-01-28 12:21:29,367 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1692 selfloop transitions, 1244 changer transitions 35/2971 dead transitions. [2023-01-28 12:21:29,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1167 places, 2971 transitions, 109393 flow [2023-01-28 12:21:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-01-28 12:21:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-01-28 12:21:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 6322 transitions. [2023-01-28 12:21:29,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26027171675586663 [2023-01-28 12:21:29,371 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 6322 transitions. [2023-01-28 12:21:29,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 6322 transitions. [2023-01-28 12:21:29,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:21:29,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 6322 transitions. [2023-01-28 12:21:29,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 90.31428571428572) internal successors, (6322), 70 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:29,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 347.0) internal successors, (24637), 71 states have internal predecessors, (24637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:29,385 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 347.0) internal successors, (24637), 71 states have internal predecessors, (24637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:29,385 INFO L175 Difference]: Start difference. First operand has 1109 places, 2627 transitions, 95661 flow. Second operand 70 states and 6322 transitions. [2023-01-28 12:21:29,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1167 places, 2971 transitions, 109393 flow [2023-01-28 12:21:47,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1126 places, 2971 transitions, 106811 flow, removed 291 selfloop flow, removed 41 redundant places. [2023-01-28 12:21:47,834 INFO L231 Difference]: Finished difference. Result has 1139 places, 2788 transitions, 103458 flow [2023-01-28 12:21:47,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=93282, PETRI_DIFFERENCE_MINUEND_PLACES=1057, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=103458, PETRI_PLACES=1139, PETRI_TRANSITIONS=2788} [2023-01-28 12:21:47,835 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1118 predicate places. [2023-01-28 12:21:47,836 INFO L495 AbstractCegarLoop]: Abstraction has has 1139 places, 2788 transitions, 103458 flow [2023-01-28 12:21:47,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:47,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:21:47,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:21:47,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-28 12:21:48,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-28 12:21:48,042 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:21:48,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:21:48,046 INFO L85 PathProgramCache]: Analyzing trace with hash 508664205, now seen corresponding path program 37 times [2023-01-28 12:21:48,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:21:48,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804805251] [2023-01-28 12:21:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:21:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:21:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:21:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:21:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:21:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804805251] [2023-01-28 12:21:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804805251] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:21:48,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132382881] [2023-01-28 12:21:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:21:48,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:21:48,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:21:48,837 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:21:48,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 12:21:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:21:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 12:21:48,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:21:49,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:21:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2023-01-28 12:21:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:21:49,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:21:49,727 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-28 12:21:49,728 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 122 [2023-01-28 12:21:49,901 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:21:49,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-01-28 12:21:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:21:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132382881] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:21:50,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:21:50,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-28 12:21:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250668763] [2023-01-28 12:21:50,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:21:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 12:21:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:21:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 12:21:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-01-28 12:21:50,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-28 12:21:50,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1139 places, 2788 transitions, 103458 flow. Second operand has 28 states, 28 states have (on average 93.75) internal successors, (2625), 28 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:21:50,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:21:50,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-28 12:21:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 12:21:59,974 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 12:21:59,974 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 [2023-01-28 12:22:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-28 12:22:00,040 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 12:22:00,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-28 12:22:00,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-28 12:22:00,246 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (28states, 92/347 universal loopers) in iteration 70,while PetriNetUnfolder was constructing finite prefix that currently has 99535 conditions, 6645 events (3651/6644 cut-off events. For 446539/446539 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 58183 event pairs, 44 based on Foata normal form. 0/7802 useless extension candidates. Maximal degree in co-relation 99201. Up to 4081 conditions per place.). [2023-01-28 12:22:00,247 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 12:22:00,247 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 12:22:00,247 INFO L445 BasicCegarLoop]: Path program histogram: [37, 19, 7, 6, 1] [2023-01-28 12:22:00,249 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 12:22:00,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 12:22:00,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 12:22:00 BasicIcfg [2023-01-28 12:22:00,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 12:22:00,251 INFO L158 Benchmark]: Toolchain (without parser) took 832378.84ms. Allocated memory was 429.9MB in the beginning and 7.8GB in the end (delta: 7.4GB). Free memory was 390.7MB in the beginning and 5.1GB in the end (delta: -4.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 310.4MB. Free memory is still 259.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.36ms. Allocated memory is still 429.9MB. Free memory was 390.3MB in the beginning and 379.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.76ms. Allocated memory is still 429.9MB. Free memory was 379.1MB in the beginning and 377.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: Boogie Preprocessor took 18.96ms. Allocated memory is still 429.9MB. Free memory was 377.0MB in the beginning and 375.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: RCFGBuilder took 372.87ms. Allocated memory is still 429.9MB. Free memory was 375.7MB in the beginning and 358.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-28 12:22:00,251 INFO L158 Benchmark]: TraceAbstraction took 831771.84ms. Allocated memory was 429.9MB in the beginning and 7.8GB in the end (delta: 7.4GB). Free memory was 358.1MB in the beginning and 5.1GB in the end (delta: -4.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-28 12:22:00,252 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 310.4MB. Free memory is still 259.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 183.36ms. Allocated memory is still 429.9MB. Free memory was 390.3MB in the beginning and 379.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.76ms. Allocated memory is still 429.9MB. Free memory was 379.1MB in the beginning and 377.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.96ms. Allocated memory is still 429.9MB. Free memory was 377.0MB in the beginning and 375.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 372.87ms. Allocated memory is still 429.9MB. Free memory was 375.7MB in the beginning and 358.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 831771.84ms. Allocated memory was 429.9MB in the beginning and 7.8GB in the end (delta: 7.4GB). Free memory was 358.1MB in the beginning and 5.1GB in the end (delta: -4.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.2s, 148 PlacesBefore, 21 PlacesAfterwards, 156 TransitionsBefore, 17 TransitionsAfterwards, 2692 CoEnabledTransitionPairs, 7 FixpointIterations, 64 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 31 ConcurrentYvCompositions, 12 ChoiceCompositions, 181 TotalNumberOfCompositions, 2696 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2648, independent: 2639, independent conditional: 0, independent unconditional: 2639, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1638, independent: 1633, independent conditional: 0, independent unconditional: 1633, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2648, independent: 1006, independent conditional: 0, independent unconditional: 1006, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1638, unknown conditional: 0, unknown unconditional: 1638] , 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: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (28states, 92/347 universal loopers) in iteration 70,while PetriNetUnfolder was constructing finite prefix that currently has 99535 conditions, 6645 events (3651/6644 cut-off events. For 446539/446539 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 58183 event pairs, 44 based on Foata normal form. 0/7802 useless extension candidates. Maximal degree in co-relation 99201. Up to 4081 conditions per place.). - TimeoutResultAtElement [Line: 86]: 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 (28states, 92/347 universal loopers) in iteration 70,while PetriNetUnfolder was constructing finite prefix that currently has 99535 conditions, 6645 events (3651/6644 cut-off events. For 446539/446539 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 58183 event pairs, 44 based on Foata normal form. 0/7802 useless extension candidates. Maximal degree in co-relation 99201. Up to 4081 conditions per place.). - TimeoutResultAtElement [Line: 85]: 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 (28states, 92/347 universal loopers) in iteration 70,while PetriNetUnfolder was constructing finite prefix that currently has 99535 conditions, 6645 events (3651/6644 cut-off events. For 446539/446539 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 58183 event pairs, 44 based on Foata normal form. 0/7802 useless extension candidates. Maximal degree in co-relation 99201. Up to 4081 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 213 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: 831.6s, OverallIterations: 70, TraceHistogramMax: 4, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 622.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 47 mSolverCounterUnknown, 10348 SdHoareTripleChecker+Valid, 61.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10348 mSDsluCounter, 2494 SdHoareTripleChecker+Invalid, 55.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 462 IncrementalHoareTripleChecker+Unchecked, 2154 mSDsCounter, 1953 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51467 IncrementalHoareTripleChecker+Invalid, 53929 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1953 mSolverCounterUnsat, 340 mSDtfsCounter, 51467 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4538 GetRequests, 1860 SyntacticMatches, 19 SemanticMatches, 2659 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 32739 ImplicationChecksByTransitivity, 121.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103458occurred in iteration=69, InterpolantAutomatonStates: 1863, 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: 0.6s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 180.3s InterpolantComputationTime, 2428 NumberOfCodeBlocks, 2417 NumberOfCodeBlocksAsserted, 194 NumberOfCheckSat, 3394 ConstructedInterpolants, 75 QuantifiedInterpolants, 65523 SizeOfPredicates, 1206 NumberOfNonLiveVariables, 11570 ConjunctsInSsa, 1828 ConjunctsInUnsatCore, 196 InterpolantComputations, 7 PerfectInterpolantSequences, 386/1248 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