/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 20:14:10,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 20:14:10,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 20:14:10,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 20:14:10,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 20:14:10,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 20:14:10,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 20:14:10,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 20:14:10,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 20:14:10,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 20:14:10,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 20:14:10,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 20:14:10,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 20:14:10,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 20:14:10,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 20:14:10,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 20:14:10,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 20:14:10,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 20:14:10,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 20:14:10,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 20:14:10,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 20:14:10,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 20:14:10,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 20:14:10,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 20:14:10,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 20:14:10,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 20:14:10,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 20:14:10,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 20:14:10,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 20:14:10,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 20:14:10,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 20:14:10,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 20:14:10,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 20:14:10,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 20:14:10,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 20:14:10,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 20:14:10,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 20:14:10,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 20:14:10,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 20:14:10,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 20:14:10,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 20:14:10,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 20:14:10,237 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 20:14:10,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 20:14:10,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 20:14:10,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 20:14:10,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 20:14:10,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 20:14:10,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 20:14:10,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 20:14:10,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:14:10,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 20:14:10,241 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 20:14:10,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 20:14:10,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 20:14:10,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 20:14:10,449 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 20:14:10,449 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 20:14:10,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-01-27 20:14:11,377 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 20:14:11,538 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 20:14:11,538 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-01-27 20:14:11,546 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45523bcd0/6de0cd2bcac14104a6effd0c17ae48b3/FLAG55188b53b [2023-01-27 20:14:11,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45523bcd0/6de0cd2bcac14104a6effd0c17ae48b3 [2023-01-27 20:14:11,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 20:14:11,558 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 20:14:11,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 20:14:11,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 20:14:11,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 20:14:11,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c02b26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11, skipping insertion in model container [2023-01-27 20:14:11,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 20:14:11,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 20:14:11,741 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-01-27 20:14:11,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:14:11,753 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 20:14:11,769 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-01-27 20:14:11,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:14:11,780 INFO L208 MainTranslator]: Completed translation [2023-01-27 20:14:11,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11 WrapperNode [2023-01-27 20:14:11,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 20:14:11,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 20:14:11,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 20:14:11,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 20:14:11,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,809 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-01-27 20:14:11,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 20:14:11,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 20:14:11,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 20:14:11,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 20:14:11,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 20:14:11,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 20:14:11,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 20:14:11,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 20:14:11,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (1/1) ... [2023-01-27 20:14:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:14:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:11,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 20:14:11,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 20:14:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 20:14:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 20:14:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 20:14:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 20:14:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 20:14:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 20:14:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 20:14:11,896 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 20:14:11,967 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 20:14:11,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 20:14:12,309 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 20:14:12,318 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 20:14:12,319 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 20:14:12,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:14:12 BoogieIcfgContainer [2023-01-27 20:14:12,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 20:14:12,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 20:14:12,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 20:14:12,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 20:14:12,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 08:14:11" (1/3) ... [2023-01-27 20:14:12,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfcb25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:14:12, skipping insertion in model container [2023-01-27 20:14:12,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:11" (2/3) ... [2023-01-27 20:14:12,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfcb25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:14:12, skipping insertion in model container [2023-01-27 20:14:12,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:14:12" (3/3) ... [2023-01-27 20:14:12,326 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-01-27 20:14:12,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 20:14:12,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 20:14:12,337 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 20:14:12,395 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 20:14:12,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 260 transitions, 536 flow [2023-01-27 20:14:12,521 INFO L130 PetriNetUnfolder]: 19/258 cut-off events. [2023-01-27 20:14:12,522 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:14:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 19/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-01-27 20:14:12,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 260 transitions, 536 flow [2023-01-27 20:14:12,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 250 transitions, 512 flow [2023-01-27 20:14:12,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 20:14:12,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 250 transitions, 512 flow [2023-01-27 20:14:12,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 250 transitions, 512 flow [2023-01-27 20:14:12,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 250 transitions, 512 flow [2023-01-27 20:14:12,595 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-01-27 20:14:12,595 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:14:12,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 19/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-01-27 20:14:12,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 9828 [2023-01-27 20:14:18,718 INFO L134 LiptonReduction]: Checked pairs total: 8979 [2023-01-27 20:14:18,718 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-01-27 20:14:18,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 20:14:18,731 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;@46134d05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 20:14:18,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 20:14:18,734 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 20:14:18,734 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:14:18,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:18,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:18,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:18,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1252061878, now seen corresponding path program 1 times [2023-01-27 20:14:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891423971] [2023-01-27 20:14:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:19,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:19,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891423971] [2023-01-27 20:14:19,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891423971] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:19,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:19,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 20:14:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109453253] [2023-01-27 20:14:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 20:14:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 20:14:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 20:14:19,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-27 20:14:19,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:19,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-27 20:14:19,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:19,117 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2023-01-27 20:14:19,118 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 20:14:19,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-27 20:14:19,120 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-27 20:14:19,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-01-27 20:14:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 20:14:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 20:14:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-01-27 20:14:19,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052194543297744 [2023-01-27 20:14:19,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-01-27 20:14:19,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-01-27 20:14:19,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:19,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-01-27 20:14:19,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,145 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 709 transitions. [2023-01-27 20:14:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-01-27 20:14:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:14:19,148 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-27 20:14:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 20:14:19,151 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 20:14:19,151 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-27 20:14:19,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:19,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:19,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 20:14:19,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:19,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash -249759115, now seen corresponding path program 1 times [2023-01-27 20:14:19,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:19,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014285686] [2023-01-27 20:14:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:19,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:19,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014285686] [2023-01-27 20:14:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014285686] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040904668] [2023-01-27 20:14:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:19,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:19,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:19,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 20:14:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 20:14:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:19,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:19,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040904668] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:19,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:19,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 20:14:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087689546] [2023-01-27 20:14:19,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:19,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 20:14:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:19,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 20:14:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-27 20:14:19,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-27 20:14:19,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:19,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-27 20:14:19,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:19,426 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2023-01-27 20:14:19,427 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 20:14:19,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2023-01-27 20:14:19,427 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2023-01-27 20:14:19,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2023-01-27 20:14:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1172 transitions. [2023-01-27 20:14:19,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170818505338078 [2023-01-27 20:14:19,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1172 transitions. [2023-01-27 20:14:19,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1172 transitions. [2023-01-27 20:14:19,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:19,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1172 transitions. [2023-01-27 20:14:19,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,454 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1172 transitions. [2023-01-27 20:14:19,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2023-01-27 20:14:19,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:19,455 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2023-01-27 20:14:19,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-01-27 20:14:19,456 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-01-27 20:14:19,456 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2023-01-27 20:14:19,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:19,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:19,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:19,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:19,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:19,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:19,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1257923115, now seen corresponding path program 2 times [2023-01-27 20:14:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:19,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949360936] [2023-01-27 20:14:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:19,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:20,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:20,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949360936] [2023-01-27 20:14:20,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949360936] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:20,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584206899] [2023-01-27 20:14:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:14:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:14:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:14:20,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-27 20:14:20,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:20,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-27 20:14:20,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:20,230 INFO L130 PetriNetUnfolder]: 57/107 cut-off events. [2023-01-27 20:14:20,230 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 20:14:20,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 107 events. 57/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2023-01-27 20:14:20,231 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 28 selfloop transitions, 8 changer transitions 3/39 dead transitions. [2023-01-27 20:14:20,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 192 flow [2023-01-27 20:14:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1007 transitions. [2023-01-27 20:14:20,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3583629893238434 [2023-01-27 20:14:20,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1007 transitions. [2023-01-27 20:14:20,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1007 transitions. [2023-01-27 20:14:20,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:20,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1007 transitions. [2023-01-27 20:14:20,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,240 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1007 transitions. [2023-01-27 20:14:20,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 192 flow [2023-01-27 20:14:20,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 182 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:20,242 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 119 flow [2023-01-27 20:14:20,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-01-27 20:14:20,243 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-27 20:14:20,244 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 119 flow [2023-01-27 20:14:20,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:20,244 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 20:14:20,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:20,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1542692659, now seen corresponding path program 3 times [2023-01-27 20:14:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:20,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024011551] [2023-01-27 20:14:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024011551] [2023-01-27 20:14:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024011551] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:20,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:20,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783344443] [2023-01-27 20:14:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:20,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:14:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:14:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:14:20,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-27 20:14:20,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:20,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-27 20:14:20,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:20,671 INFO L130 PetriNetUnfolder]: 73/136 cut-off events. [2023-01-27 20:14:20,671 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-27 20:14:20,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 136 events. 73/136 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 8 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 384. Up to 89 conditions per place. [2023-01-27 20:14:20,672 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 34 selfloop transitions, 9 changer transitions 1/44 dead transitions. [2023-01-27 20:14:20,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 263 flow [2023-01-27 20:14:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2023-01-27 20:14:20,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35765124555160144 [2023-01-27 20:14:20,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2023-01-27 20:14:20,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2023-01-27 20:14:20,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:20,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2023-01-27 20:14:20,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,687 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 119 flow. Second operand 5 states and 1005 transitions. [2023-01-27 20:14:20,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 263 flow [2023-01-27 20:14:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:20,690 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 190 flow [2023-01-27 20:14:20,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-01-27 20:14:20,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-27 20:14:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 190 flow [2023-01-27 20:14:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:20,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 20:14:20,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:20,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 916610877, now seen corresponding path program 4 times [2023-01-27 20:14:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236317702] [2023-01-27 20:14:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236317702] [2023-01-27 20:14:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236317702] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:20,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30871957] [2023-01-27 20:14:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:20,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:14:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:14:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:14:21,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-27 20:14:21,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:21,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-27 20:14:21,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:21,176 INFO L130 PetriNetUnfolder]: 135/258 cut-off events. [2023-01-27 20:14:21,176 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-01-27 20:14:21,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 258 events. 135/258 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 915 event pairs, 22 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 877. Up to 120 conditions per place. [2023-01-27 20:14:21,179 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 50 selfloop transitions, 8 changer transitions 8/66 dead transitions. [2023-01-27 20:14:21,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 466 flow [2023-01-27 20:14:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-01-27 20:14:21,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3612099644128114 [2023-01-27 20:14:21,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-01-27 20:14:21,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-01-27 20:14:21,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:21,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-01-27 20:14:21,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,188 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 190 flow. Second operand 5 states and 1015 transitions. [2023-01-27 20:14:21,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 466 flow [2023-01-27 20:14:21,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 449 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:21,192 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 249 flow [2023-01-27 20:14:21,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-01-27 20:14:21,194 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-27 20:14:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 249 flow [2023-01-27 20:14:21,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 20:14:21,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:21,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1558748101, now seen corresponding path program 5 times [2023-01-27 20:14:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985455256] [2023-01-27 20:14:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:21,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985455256] [2023-01-27 20:14:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985455256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:21,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:21,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573220011] [2023-01-27 20:14:21,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:21,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:14:21,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:14:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:14:21,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-27 20:14:21,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:21,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-27 20:14:21,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:21,625 INFO L130 PetriNetUnfolder]: 131/254 cut-off events. [2023-01-27 20:14:21,625 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2023-01-27 20:14:21,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 254 events. 131/254 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 918 event pairs, 14 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 962. Up to 138 conditions per place. [2023-01-27 20:14:21,627 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 46 selfloop transitions, 12 changer transitions 1/59 dead transitions. [2023-01-27 20:14:21,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 463 flow [2023-01-27 20:14:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1009 transitions. [2023-01-27 20:14:21,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3590747330960854 [2023-01-27 20:14:21,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1009 transitions. [2023-01-27 20:14:21,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1009 transitions. [2023-01-27 20:14:21,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:21,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1009 transitions. [2023-01-27 20:14:21,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,636 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,637 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 249 flow. Second operand 5 states and 1009 transitions. [2023-01-27 20:14:21,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 463 flow [2023-01-27 20:14:21,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:21,640 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 321 flow [2023-01-27 20:14:21,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-01-27 20:14:21,642 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-01-27 20:14:21,642 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 321 flow [2023-01-27 20:14:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:21,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:21,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 20:14:21,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:21,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash 441881161, now seen corresponding path program 6 times [2023-01-27 20:14:21,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:21,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653094041] [2023-01-27 20:14:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:21,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:22,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653094041] [2023-01-27 20:14:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653094041] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:22,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:22,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415656672] [2023-01-27 20:14:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:22,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:14:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:14:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:14:22,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-27 20:14:22,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:22,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-27 20:14:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:22,180 INFO L130 PetriNetUnfolder]: 188/375 cut-off events. [2023-01-27 20:14:22,180 INFO L131 PetriNetUnfolder]: For 956/956 co-relation queries the response was YES. [2023-01-27 20:14:22,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 375 events. 188/375 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1607 event pairs, 48 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 1592. Up to 219 conditions per place. [2023-01-27 20:14:22,182 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 57 selfloop transitions, 14 changer transitions 5/76 dead transitions. [2023-01-27 20:14:22,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 695 flow [2023-01-27 20:14:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-01-27 20:14:22,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604982206405694 [2023-01-27 20:14:22,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-01-27 20:14:22,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-01-27 20:14:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:22,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-01-27 20:14:22,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,219 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,219 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 321 flow. Second operand 5 states and 1013 transitions. [2023-01-27 20:14:22,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 695 flow [2023-01-27 20:14:22,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 664 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:22,223 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 462 flow [2023-01-27 20:14:22,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-01-27 20:14:22,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-01-27 20:14:22,223 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 462 flow [2023-01-27 20:14:22,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:22,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 20:14:22,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:22,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 188433506, now seen corresponding path program 1 times [2023-01-27 20:14:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:22,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129582616] [2023-01-27 20:14:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:22,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129582616] [2023-01-27 20:14:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129582616] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:22,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891575911] [2023-01-27 20:14:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:22,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:22,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 20:14:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 20:14:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:22,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891575911] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:22,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:22,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 20:14:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279734633] [2023-01-27 20:14:22,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 20:14:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 20:14:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 20:14:22,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:22,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 206.125) internal successors, (1649), 8 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:22,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:22,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:22,697 INFO L130 PetriNetUnfolder]: 184/360 cut-off events. [2023-01-27 20:14:22,697 INFO L131 PetriNetUnfolder]: For 1397/1397 co-relation queries the response was YES. [2023-01-27 20:14:22,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 360 events. 184/360 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1461 event pairs, 26 based on Foata normal form. 12/360 useless extension candidates. Maximal degree in co-relation 1748. Up to 161 conditions per place. [2023-01-27 20:14:22,700 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 61 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2023-01-27 20:14:22,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 734 flow [2023-01-27 20:14:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1057 transitions. [2023-01-27 20:14:22,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37615658362989324 [2023-01-27 20:14:22,703 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1057 transitions. [2023-01-27 20:14:22,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1057 transitions. [2023-01-27 20:14:22,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:22,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1057 transitions. [2023-01-27 20:14:22,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,708 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,708 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 462 flow. Second operand 5 states and 1057 transitions. [2023-01-27 20:14:22,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 734 flow [2023-01-27 20:14:22,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 718 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-27 20:14:22,714 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 485 flow [2023-01-27 20:14:22,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-01-27 20:14:22,716 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-01-27 20:14:22,716 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 485 flow [2023-01-27 20:14:22,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 206.125) internal successors, (1649), 8 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:22,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:22,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:22,922 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,SelfDestructingSolverStorable7 [2023-01-27 20:14:22,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:22,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -558172369, now seen corresponding path program 1 times [2023-01-27 20:14:22,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035419619] [2023-01-27 20:14:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:23,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035419619] [2023-01-27 20:14:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035419619] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:23,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:23,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052714942] [2023-01-27 20:14:23,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:23,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:23,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:23,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:23,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:23,183 INFO L130 PetriNetUnfolder]: 174/340 cut-off events. [2023-01-27 20:14:23,184 INFO L131 PetriNetUnfolder]: For 1684/1684 co-relation queries the response was YES. [2023-01-27 20:14:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 340 events. 174/340 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1344 event pairs, 48 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1745. Up to 200 conditions per place. [2023-01-27 20:14:23,186 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 12 changer transitions 9/74 dead transitions. [2023-01-27 20:14:23,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 753 flow [2023-01-27 20:14:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2023-01-27 20:14:23,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758007117437722 [2023-01-27 20:14:23,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2023-01-27 20:14:23,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2023-01-27 20:14:23,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:23,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2023-01-27 20:14:23,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,194 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,194 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 485 flow. Second operand 5 states and 1056 transitions. [2023-01-27 20:14:23,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 753 flow [2023-01-27 20:14:23,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 723 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 20:14:23,198 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 500 flow [2023-01-27 20:14:23,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-01-27 20:14:23,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-01-27 20:14:23,199 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 500 flow [2023-01-27 20:14:23,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:23,200 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:23,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 20:14:23,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:23,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -124247684, now seen corresponding path program 2 times [2023-01-27 20:14:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:23,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685430190] [2023-01-27 20:14:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:23,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685430190] [2023-01-27 20:14:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685430190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343468434] [2023-01-27 20:14:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:14:23,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:23,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:23,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:23,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 20:14:23,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:14:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 20:14:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:23,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343468434] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:23,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:14:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2023-01-27 20:14:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226228738] [2023-01-27 20:14:23,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-01-27 20:14:23,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:23,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:23,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:23,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:23,700 INFO L130 PetriNetUnfolder]: 162/317 cut-off events. [2023-01-27 20:14:23,700 INFO L131 PetriNetUnfolder]: For 1430/1430 co-relation queries the response was YES. [2023-01-27 20:14:23,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 317 events. 162/317 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1232 event pairs, 18 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1678. Up to 240 conditions per place. [2023-01-27 20:14:23,702 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 57 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-01-27 20:14:23,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 739 flow [2023-01-27 20:14:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1054 transitions. [2023-01-27 20:14:23,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37508896797153024 [2023-01-27 20:14:23,705 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1054 transitions. [2023-01-27 20:14:23,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1054 transitions. [2023-01-27 20:14:23,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:23,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1054 transitions. [2023-01-27 20:14:23,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,720 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 500 flow. Second operand 5 states and 1054 transitions. [2023-01-27 20:14:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 739 flow [2023-01-27 20:14:23,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 705 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-01-27 20:14:23,725 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 524 flow [2023-01-27 20:14:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-01-27 20:14:23,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-01-27 20:14:23,726 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 524 flow [2023-01-27 20:14:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:23,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:23,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:23,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:23,933 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 [2023-01-27 20:14:23,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:23,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 83227730, now seen corresponding path program 3 times [2023-01-27 20:14:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:23,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868088755] [2023-01-27 20:14:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:23,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868088755] [2023-01-27 20:14:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868088755] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297969249] [2023-01-27 20:14:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:24,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:24,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:24,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:24,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:24,136 INFO L130 PetriNetUnfolder]: 158/305 cut-off events. [2023-01-27 20:14:24,137 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-01-27 20:14:24,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 305 events. 158/305 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1139 event pairs, 43 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 1646. Up to 189 conditions per place. [2023-01-27 20:14:24,139 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2023-01-27 20:14:24,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 691 flow [2023-01-27 20:14:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-27 20:14:24,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-27 20:14:24,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-27 20:14:24,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-27 20:14:24,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:24,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-27 20:14:24,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,146 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 524 flow. Second operand 5 states and 1050 transitions. [2023-01-27 20:14:24,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 691 flow [2023-01-27 20:14:24,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 676 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:24,150 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 512 flow [2023-01-27 20:14:24,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-01-27 20:14:24,151 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-01-27 20:14:24,151 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 512 flow [2023-01-27 20:14:24,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:24,151 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 20:14:24,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:24,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 452015418, now seen corresponding path program 4 times [2023-01-27 20:14:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847478032] [2023-01-27 20:14:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847478032] [2023-01-27 20:14:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847478032] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179896253] [2023-01-27 20:14:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:24,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:24,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 512 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:24,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:24,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:24,357 INFO L130 PetriNetUnfolder]: 155/300 cut-off events. [2023-01-27 20:14:24,357 INFO L131 PetriNetUnfolder]: For 1597/1597 co-relation queries the response was YES. [2023-01-27 20:14:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 300 events. 155/300 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1126 event pairs, 37 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 1626. Up to 200 conditions per place. [2023-01-27 20:14:24,359 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 14 changer transitions 7/74 dead transitions. [2023-01-27 20:14:24,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 815 flow [2023-01-27 20:14:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1054 transitions. [2023-01-27 20:14:24,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37508896797153024 [2023-01-27 20:14:24,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1054 transitions. [2023-01-27 20:14:24,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1054 transitions. [2023-01-27 20:14:24,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:24,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1054 transitions. [2023-01-27 20:14:24,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,366 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 512 flow. Second operand 5 states and 1054 transitions. [2023-01-27 20:14:24,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 815 flow [2023-01-27 20:14:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:24,370 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 549 flow [2023-01-27 20:14:24,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-01-27 20:14:24,371 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-01-27 20:14:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 549 flow [2023-01-27 20:14:24,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:24,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 20:14:24,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:24,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1469209266, now seen corresponding path program 5 times [2023-01-27 20:14:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666750654] [2023-01-27 20:14:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:24,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:24,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666750654] [2023-01-27 20:14:24,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666750654] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:24,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:24,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:24,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146915062] [2023-01-27 20:14:24,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:24,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:24,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:24,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:24,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:24,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:24,581 INFO L130 PetriNetUnfolder]: 150/286 cut-off events. [2023-01-27 20:14:24,581 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-01-27 20:14:24,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 286 events. 150/286 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1013 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 1640. Up to 200 conditions per place. [2023-01-27 20:14:24,583 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 49 selfloop transitions, 14 changer transitions 2/65 dead transitions. [2023-01-27 20:14:24,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 742 flow [2023-01-27 20:14:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1051 transitions. [2023-01-27 20:14:24,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37402135231316724 [2023-01-27 20:14:24,585 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1051 transitions. [2023-01-27 20:14:24,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1051 transitions. [2023-01-27 20:14:24,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:24,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1051 transitions. [2023-01-27 20:14:24,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,590 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 549 flow. Second operand 5 states and 1051 transitions. [2023-01-27 20:14:24,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 742 flow [2023-01-27 20:14:24,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 708 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:24,594 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 537 flow [2023-01-27 20:14:24,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-01-27 20:14:24,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-01-27 20:14:24,595 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 537 flow [2023-01-27 20:14:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:24,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:24,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 20:14:24,596 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:24,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1010058385, now seen corresponding path program 2 times [2023-01-27 20:14:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308067334] [2023-01-27 20:14:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:24,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308067334] [2023-01-27 20:14:24,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308067334] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:24,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:24,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:24,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967997855] [2023-01-27 20:14:24,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:24,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:24,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:24,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:24,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:24,815 INFO L130 PetriNetUnfolder]: 145/274 cut-off events. [2023-01-27 20:14:24,815 INFO L131 PetriNetUnfolder]: For 1653/1653 co-relation queries the response was YES. [2023-01-27 20:14:24,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 274 events. 145/274 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 960 event pairs, 11 based on Foata normal form. 8/276 useless extension candidates. Maximal degree in co-relation 1558. Up to 137 conditions per place. [2023-01-27 20:14:24,817 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 51 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-01-27 20:14:24,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 755 flow [2023-01-27 20:14:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1053 transitions. [2023-01-27 20:14:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747330960854093 [2023-01-27 20:14:24,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1053 transitions. [2023-01-27 20:14:24,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1053 transitions. [2023-01-27 20:14:24,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:24,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1053 transitions. [2023-01-27 20:14:24,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,824 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 537 flow. Second operand 5 states and 1053 transitions. [2023-01-27 20:14:24,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 755 flow [2023-01-27 20:14:24,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 732 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:24,829 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 544 flow [2023-01-27 20:14:24,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-01-27 20:14:24,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-01-27 20:14:24,829 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 544 flow [2023-01-27 20:14:24,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:24,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 20:14:24,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:24,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash 813217747, now seen corresponding path program 3 times [2023-01-27 20:14:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:24,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446663945] [2023-01-27 20:14:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446663945] [2023-01-27 20:14:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446663945] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:24,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322334766] [2023-01-27 20:14:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:24,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:24,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:24,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:24,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:25,024 INFO L130 PetriNetUnfolder]: 141/270 cut-off events. [2023-01-27 20:14:25,024 INFO L131 PetriNetUnfolder]: For 1886/1886 co-relation queries the response was YES. [2023-01-27 20:14:25,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 270 events. 141/270 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 41 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1546. Up to 187 conditions per place. [2023-01-27 20:14:25,026 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 4/61 dead transitions. [2023-01-27 20:14:25,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 699 flow [2023-01-27 20:14:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-27 20:14:25,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-27 20:14:25,029 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:25,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,034 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 544 flow. Second operand 5 states and 1050 transitions. [2023-01-27 20:14:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 699 flow [2023-01-27 20:14:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 668 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-27 20:14:25,038 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 509 flow [2023-01-27 20:14:25,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-01-27 20:14:25,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-01-27 20:14:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 509 flow [2023-01-27 20:14:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:25,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-27 20:14:25,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:25,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2119422363, now seen corresponding path program 4 times [2023-01-27 20:14:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591671364] [2023-01-27 20:14:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:25,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591671364] [2023-01-27 20:14:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591671364] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:25,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:25,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787060933] [2023-01-27 20:14:25,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:25,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:25,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:25,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 509 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:25,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:25,242 INFO L130 PetriNetUnfolder]: 124/230 cut-off events. [2023-01-27 20:14:25,242 INFO L131 PetriNetUnfolder]: For 1587/1587 co-relation queries the response was YES. [2023-01-27 20:14:25,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 230 events. 124/230 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 718 event pairs, 31 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1364. Up to 144 conditions per place. [2023-01-27 20:14:25,244 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2023-01-27 20:14:25,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 660 flow [2023-01-27 20:14:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-27 20:14:25,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-27 20:14:25,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:25,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-27 20:14:25,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,251 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,251 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 509 flow. Second operand 5 states and 1050 transitions. [2023-01-27 20:14:25,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 660 flow [2023-01-27 20:14:25,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 612 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-01-27 20:14:25,257 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 464 flow [2023-01-27 20:14:25,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-01-27 20:14:25,257 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-01-27 20:14:25,257 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 464 flow [2023-01-27 20:14:25,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:25,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:25,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 20:14:25,258 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:25,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1470993204, now seen corresponding path program 6 times [2023-01-27 20:14:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853444181] [2023-01-27 20:14:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853444181] [2023-01-27 20:14:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853444181] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:25,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:14:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057378145] [2023-01-27 20:14:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-27 20:14:25,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:25,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-27 20:14:25,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:25,453 INFO L130 PetriNetUnfolder]: 114/205 cut-off events. [2023-01-27 20:14:25,453 INFO L131 PetriNetUnfolder]: For 1406/1406 co-relation queries the response was YES. [2023-01-27 20:14:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 205 events. 114/205 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 601 event pairs, 31 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 1221. Up to 152 conditions per place. [2023-01-27 20:14:25,455 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 41 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-01-27 20:14:25,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 609 flow [2023-01-27 20:14:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1049 transitions. [2023-01-27 20:14:25,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37330960854092526 [2023-01-27 20:14:25,457 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1049 transitions. [2023-01-27 20:14:25,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1049 transitions. [2023-01-27 20:14:25,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:25,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1049 transitions. [2023-01-27 20:14:25,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,461 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,462 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 464 flow. Second operand 5 states and 1049 transitions. [2023-01-27 20:14:25,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 609 flow [2023-01-27 20:14:25,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 539 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-01-27 20:14:25,465 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 405 flow [2023-01-27 20:14:25,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-01-27 20:14:25,466 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-01-27 20:14:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 405 flow [2023-01-27 20:14:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 20:14:25,467 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:25,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 727784278, now seen corresponding path program 1 times [2023-01-27 20:14:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050452337] [2023-01-27 20:14:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050452337] [2023-01-27 20:14:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050452337] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609710567] [2023-01-27 20:14:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:26,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:26,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:26,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 20:14:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:14:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:26,829 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 98 treesize of output 62 [2023-01-27 20:14:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:27,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:27,969 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 216 treesize of output 144 [2023-01-27 20:14:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609710567] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:28,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:28,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-27 20:14:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176505902] [2023-01-27 20:14:28,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:14:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:14:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:14:28,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:28,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 405 flow. Second operand has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:28,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:28,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:28,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:30,382 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-01-27 20:14:30,383 INFO L131 PetriNetUnfolder]: For 2245/2245 co-relation queries the response was YES. [2023-01-27 20:14:30,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 503 events. 265/503 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2212 event pairs, 15 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 2583. Up to 142 conditions per place. [2023-01-27 20:14:30,386 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 90 selfloop transitions, 51 changer transitions 28/169 dead transitions. [2023-01-27 20:14:30,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 169 transitions, 1513 flow [2023-01-27 20:14:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 20:14:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 20:14:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4185 transitions. [2023-01-27 20:14:30,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237660529166022 [2023-01-27 20:14:30,394 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4185 transitions. [2023-01-27 20:14:30,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4185 transitions. [2023-01-27 20:14:30,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:30,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4185 transitions. [2023-01-27 20:14:30,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 181.95652173913044) internal successors, (4185), 23 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:30,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:30,412 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:30,412 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 405 flow. Second operand 23 states and 4185 transitions. [2023-01-27 20:14:30,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 169 transitions, 1513 flow [2023-01-27 20:14:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1435 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-27 20:14:30,418 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 933 flow [2023-01-27 20:14:30,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=933, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-01-27 20:14:30,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-01-27 20:14:30,418 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 933 flow [2023-01-27 20:14:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:30,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:30,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:30,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 20:14:30,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:30,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 765734618, now seen corresponding path program 2 times [2023-01-27 20:14:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642220659] [2023-01-27 20:14:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:31,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642220659] [2023-01-27 20:14:31,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642220659] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738279615] [2023-01-27 20:14:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:14:31,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:31,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:31,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 20:14:31,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:14:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:14:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:31,994 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 171 treesize of output 115 [2023-01-27 20:14:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:32,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:33,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:33,300 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 340 treesize of output 220 [2023-01-27 20:14:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:33,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738279615] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:33,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:33,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-27 20:14:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052350003] [2023-01-27 20:14:33,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:14:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:14:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:14:33,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 933 flow. Second operand has 22 states, 22 states have (on average 178.0) internal successors, (3916), 22 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:33,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:33,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:35,435 INFO L130 PetriNetUnfolder]: 309/625 cut-off events. [2023-01-27 20:14:35,435 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-01-27 20:14:35,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 625 events. 309/625 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3053 event pairs, 42 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3554. Up to 184 conditions per place. [2023-01-27 20:14:35,439 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 96 selfloop transitions, 58 changer transitions 7/161 dead transitions. [2023-01-27 20:14:35,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1887 flow [2023-01-27 20:14:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:14:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:14:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2901 transitions. [2023-01-27 20:14:35,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32262010676156583 [2023-01-27 20:14:35,443 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2901 transitions. [2023-01-27 20:14:35,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2901 transitions. [2023-01-27 20:14:35,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:35,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2901 transitions. [2023-01-27 20:14:35,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 181.3125) internal successors, (2901), 16 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:35,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:35,453 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:35,453 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 933 flow. Second operand 16 states and 2901 transitions. [2023-01-27 20:14:35,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1887 flow [2023-01-27 20:14:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 161 transitions, 1564 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-01-27 20:14:35,465 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1196 flow [2023-01-27 20:14:35,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1196, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-01-27 20:14:35,466 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-27 20:14:35,466 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1196 flow [2023-01-27 20:14:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 178.0) internal successors, (3916), 22 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:35,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:35,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:35,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:35,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:35,676 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:35,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -12713086, now seen corresponding path program 3 times [2023-01-27 20:14:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491789362] [2023-01-27 20:14:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491789362] [2023-01-27 20:14:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491789362] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711897373] [2023-01-27 20:14:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:14:36,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:36,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:36,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 20:14:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:14:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:14:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:36,898 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 197 treesize of output 129 [2023-01-27 20:14:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:37,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:38,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:38,965 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 344 treesize of output 232 [2023-01-27 20:14:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:39,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711897373] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:39,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:39,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-27 20:14:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602533145] [2023-01-27 20:14:39,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:14:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:14:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:14:39,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:39,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1196 flow. Second operand has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:39,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:39,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:39,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:41,874 INFO L130 PetriNetUnfolder]: 400/856 cut-off events. [2023-01-27 20:14:41,875 INFO L131 PetriNetUnfolder]: For 4962/4962 co-relation queries the response was YES. [2023-01-27 20:14:41,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 856 events. 400/856 cut-off events. For 4962/4962 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4841 event pairs, 73 based on Foata normal form. 12/866 useless extension candidates. Maximal degree in co-relation 4474. Up to 411 conditions per place. [2023-01-27 20:14:41,880 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 141 selfloop transitions, 77 changer transitions 20/238 dead transitions. [2023-01-27 20:14:41,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 238 transitions, 2432 flow [2023-01-27 20:14:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:14:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:14:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4724 transitions. [2023-01-27 20:14:41,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32329592116068984 [2023-01-27 20:14:41,884 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4724 transitions. [2023-01-27 20:14:41,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4724 transitions. [2023-01-27 20:14:41,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:41,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4724 transitions. [2023-01-27 20:14:41,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 181.69230769230768) internal successors, (4724), 26 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:41,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:41,896 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:41,896 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1196 flow. Second operand 26 states and 4724 transitions. [2023-01-27 20:14:41,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 238 transitions, 2432 flow [2023-01-27 20:14:41,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 238 transitions, 2236 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-01-27 20:14:41,915 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1639 flow [2023-01-27 20:14:41,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1639, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2023-01-27 20:14:41,916 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-01-27 20:14:41,916 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1639 flow [2023-01-27 20:14:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:41,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:41,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:41,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:42,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:42,124 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:42,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2073572888, now seen corresponding path program 4 times [2023-01-27 20:14:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:42,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833282109] [2023-01-27 20:14:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833282109] [2023-01-27 20:14:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833282109] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289419340] [2023-01-27 20:14:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:14:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:42,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:42,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 20:14:42,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:14:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:14:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:43,086 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 197 treesize of output 129 [2023-01-27 20:14:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:43,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:44,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:44,870 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 354 treesize of output 234 [2023-01-27 20:14:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289419340] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:45,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 20:14:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324218942] [2023-01-27 20:14:45,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:14:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:14:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:14:45,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:45,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1639 flow. Second operand has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:45,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:45,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:46,960 INFO L130 PetriNetUnfolder]: 427/929 cut-off events. [2023-01-27 20:14:46,960 INFO L131 PetriNetUnfolder]: For 5290/5290 co-relation queries the response was YES. [2023-01-27 20:14:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 929 events. 427/929 cut-off events. For 5290/5290 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5441 event pairs, 55 based on Foata normal form. 9/936 useless extension candidates. Maximal degree in co-relation 4939. Up to 239 conditions per place. [2023-01-27 20:14:46,967 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 127 selfloop transitions, 81 changer transitions 21/229 dead transitions. [2023-01-27 20:14:46,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2700 flow [2023-01-27 20:14:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:14:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:14:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3273 transitions. [2023-01-27 20:14:46,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235468564650059 [2023-01-27 20:14:46,970 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3273 transitions. [2023-01-27 20:14:46,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3273 transitions. [2023-01-27 20:14:46,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:46,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3273 transitions. [2023-01-27 20:14:46,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.83333333333334) internal successors, (3273), 18 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:46,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:46,977 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:46,977 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1639 flow. Second operand 18 states and 3273 transitions. [2023-01-27 20:14:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2700 flow [2023-01-27 20:14:46,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 229 transitions, 2445 flow, removed 117 selfloop flow, removed 7 redundant places. [2023-01-27 20:14:47,001 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1802 flow [2023-01-27 20:14:47,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2023-01-27 20:14:47,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-01-27 20:14:47,002 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1802 flow [2023-01-27 20:14:47,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:47,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:47,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:47,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:47,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:47,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1557072660, now seen corresponding path program 5 times [2023-01-27 20:14:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286805018] [2023-01-27 20:14:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:47,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286805018] [2023-01-27 20:14:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286805018] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674697032] [2023-01-27 20:14:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:14:47,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:47,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 20:14:47,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:14:47,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:14:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:48,210 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 215 treesize of output 139 [2023-01-27 20:14:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:48,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:49,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:49,817 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 325 treesize of output 213 [2023-01-27 20:14:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674697032] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:50,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 20:14:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479903869] [2023-01-27 20:14:50,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:50,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:14:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:14:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:14:50,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:50,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1802 flow. Second operand has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:50,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:50,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:50,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:51,384 INFO L130 PetriNetUnfolder]: 471/1035 cut-off events. [2023-01-27 20:14:51,385 INFO L131 PetriNetUnfolder]: For 6541/6541 co-relation queries the response was YES. [2023-01-27 20:14:51,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1035 events. 471/1035 cut-off events. For 6541/6541 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6357 event pairs, 78 based on Foata normal form. 2/1035 useless extension candidates. Maximal degree in co-relation 5614. Up to 441 conditions per place. [2023-01-27 20:14:51,392 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 160 selfloop transitions, 90 changer transitions 12/262 dead transitions. [2023-01-27 20:14:51,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 262 transitions, 3113 flow [2023-01-27 20:14:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 20:14:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 20:14:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3808 transitions. [2023-01-27 20:14:51,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32265717674970346 [2023-01-27 20:14:51,400 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3808 transitions. [2023-01-27 20:14:51,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3808 transitions. [2023-01-27 20:14:51,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:51,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3808 transitions. [2023-01-27 20:14:51,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:51,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:51,409 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:51,409 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1802 flow. Second operand 21 states and 3808 transitions. [2023-01-27 20:14:51,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 262 transitions, 3113 flow [2023-01-27 20:14:51,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 262 transitions, 2965 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-01-27 20:14:51,442 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 2317 flow [2023-01-27 20:14:51,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2317, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2023-01-27 20:14:51,442 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-01-27 20:14:51,442 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 2317 flow [2023-01-27 20:14:51,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:51,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:51,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 20:14:51,648 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,SelfDestructingSolverStorable21 [2023-01-27 20:14:51,648 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:51,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -840476054, now seen corresponding path program 6 times [2023-01-27 20:14:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:51,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233820350] [2023-01-27 20:14:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:52,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:52,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233820350] [2023-01-27 20:14:52,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233820350] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:52,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480973557] [2023-01-27 20:14:52,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:14:52,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:52,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:52,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 20:14:52,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:14:52,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 20:14:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:52,653 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 182 treesize of output 118 [2023-01-27 20:14:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:52,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:54,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:54,861 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 441 treesize of output 321 [2023-01-27 20:14:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480973557] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:55,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:55,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-27 20:14:55,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593526664] [2023-01-27 20:14:55,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:14:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:14:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:14:55,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:55,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 2317 flow. Second operand has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:55,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:55,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:55,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:57,439 INFO L130 PetriNetUnfolder]: 536/1174 cut-off events. [2023-01-27 20:14:57,439 INFO L131 PetriNetUnfolder]: For 9351/9351 co-relation queries the response was YES. [2023-01-27 20:14:57,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1174 events. 536/1174 cut-off events. For 9351/9351 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7459 event pairs, 94 based on Foata normal form. 14/1186 useless extension candidates. Maximal degree in co-relation 6741. Up to 633 conditions per place. [2023-01-27 20:14:57,450 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 169 selfloop transitions, 99 changer transitions 22/290 dead transitions. [2023-01-27 20:14:57,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3711 flow [2023-01-27 20:14:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:14:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:14:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3638 transitions. [2023-01-27 20:14:57,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32366548042704624 [2023-01-27 20:14:57,454 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3638 transitions. [2023-01-27 20:14:57,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3638 transitions. [2023-01-27 20:14:57,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:57,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3638 transitions. [2023-01-27 20:14:57,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 181.9) internal successors, (3638), 20 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:57,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:57,464 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:57,464 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 2317 flow. Second operand 20 states and 3638 transitions. [2023-01-27 20:14:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3711 flow [2023-01-27 20:14:57,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 290 transitions, 3528 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-01-27 20:14:57,522 INFO L231 Difference]: Finished difference. Result has 185 places, 217 transitions, 2730 flow [2023-01-27 20:14:57,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2730, PETRI_PLACES=185, PETRI_TRANSITIONS=217} [2023-01-27 20:14:57,523 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-01-27 20:14:57,523 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 217 transitions, 2730 flow [2023-01-27 20:14:57,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:57,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:57,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:57,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 20:14:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:57,729 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:14:57,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1290945382, now seen corresponding path program 7 times [2023-01-27 20:14:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:57,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591915973] [2023-01-27 20:14:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591915973] [2023-01-27 20:14:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591915973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060883597] [2023-01-27 20:14:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:14:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:58,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:14:58,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 20:14:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:14:58,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:58,786 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 185 treesize of output 117 [2023-01-27 20:14:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:59,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:59,814 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 288 treesize of output 184 [2023-01-27 20:14:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060883597] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:59,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 20:14:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868643585] [2023-01-27 20:14:59,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:14:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:14:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:14:59,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:14:59,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 217 transitions, 2730 flow. Second operand has 21 states, 21 states have (on average 177.9047619047619) internal successors, (3736), 21 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:59,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:59,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:14:59,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:02,680 INFO L130 PetriNetUnfolder]: 729/1682 cut-off events. [2023-01-27 20:15:02,681 INFO L131 PetriNetUnfolder]: For 15656/15656 co-relation queries the response was YES. [2023-01-27 20:15:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10298 conditions, 1682 events. 729/1682 cut-off events. For 15656/15656 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12084 event pairs, 71 based on Foata normal form. 9/1689 useless extension candidates. Maximal degree in co-relation 10220. Up to 433 conditions per place. [2023-01-27 20:15:02,691 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 180 selfloop transitions, 187 changer transitions 24/391 dead transitions. [2023-01-27 20:15:02,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 5330 flow [2023-01-27 20:15:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 20:15:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 20:15:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4898 transitions. [2023-01-27 20:15:02,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32278898115197047 [2023-01-27 20:15:02,697 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4898 transitions. [2023-01-27 20:15:02,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4898 transitions. [2023-01-27 20:15:02,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:02,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4898 transitions. [2023-01-27 20:15:02,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 181.40740740740742) internal successors, (4898), 27 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:02,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:02,710 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:02,710 INFO L175 Difference]: Start difference. First operand has 185 places, 217 transitions, 2730 flow. Second operand 27 states and 4898 transitions. [2023-01-27 20:15:02,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 5330 flow [2023-01-27 20:15:02,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 391 transitions, 5136 flow, removed 92 selfloop flow, removed 7 redundant places. [2023-01-27 20:15:02,794 INFO L231 Difference]: Finished difference. Result has 214 places, 289 transitions, 4361 flow [2023-01-27 20:15:02,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4361, PETRI_PLACES=214, PETRI_TRANSITIONS=289} [2023-01-27 20:15:02,795 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-27 20:15:02,795 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 289 transitions, 4361 flow [2023-01-27 20:15:02,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 177.9047619047619) internal successors, (3736), 21 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:02,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:02,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:02,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:02,996 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,SelfDestructingSolverStorable23 [2023-01-27 20:15:02,996 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:02,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 781489274, now seen corresponding path program 8 times [2023-01-27 20:15:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351252208] [2023-01-27 20:15:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:02,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:03,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351252208] [2023-01-27 20:15:03,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351252208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453960775] [2023-01-27 20:15:03,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:15:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:03,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:03,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 20:15:03,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:15:03,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:15:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:03,965 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 143 treesize of output 91 [2023-01-27 20:15:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:04,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:05,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:05,222 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 400 treesize of output 248 [2023-01-27 20:15:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453960775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:05,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-27 20:15:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359009090] [2023-01-27 20:15:05,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:15:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:15:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:15:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:15:05,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 289 transitions, 4361 flow. Second operand has 20 states, 20 states have (on average 177.95) internal successors, (3559), 20 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:05,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:05,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:15:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:07,010 INFO L130 PetriNetUnfolder]: 712/1628 cut-off events. [2023-01-27 20:15:07,010 INFO L131 PetriNetUnfolder]: For 17124/17124 co-relation queries the response was YES. [2023-01-27 20:15:07,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10794 conditions, 1628 events. 712/1628 cut-off events. For 17124/17124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11401 event pairs, 142 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 10706. Up to 755 conditions per place. [2023-01-27 20:15:07,021 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 203 selfloop transitions, 122 changer transitions 15/340 dead transitions. [2023-01-27 20:15:07,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 340 transitions, 5390 flow [2023-01-27 20:15:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:15:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:15:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3080 transitions. [2023-01-27 20:15:07,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32237806154490267 [2023-01-27 20:15:07,024 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3080 transitions. [2023-01-27 20:15:07,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3080 transitions. [2023-01-27 20:15:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:07,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3080 transitions. [2023-01-27 20:15:07,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.1764705882353) internal successors, (3080), 17 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:07,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:07,033 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:07,033 INFO L175 Difference]: Start difference. First operand has 214 places, 289 transitions, 4361 flow. Second operand 17 states and 3080 transitions. [2023-01-27 20:15:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 340 transitions, 5390 flow [2023-01-27 20:15:07,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 340 transitions, 4619 flow, removed 335 selfloop flow, removed 13 redundant places. [2023-01-27 20:15:07,175 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 3899 flow [2023-01-27 20:15:07,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3899, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-01-27 20:15:07,175 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-01-27 20:15:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 3899 flow [2023-01-27 20:15:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 177.95) internal successors, (3559), 20 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:07,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:07,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:07,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 20:15:07,376 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,SelfDestructingSolverStorable24 [2023-01-27 20:15:07,377 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:07,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash 854566266, now seen corresponding path program 9 times [2023-01-27 20:15:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132984102] [2023-01-27 20:15:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:08,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:08,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132984102] [2023-01-27 20:15:08,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132984102] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:08,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280826058] [2023-01-27 20:15:08,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:15:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:08,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:08,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 20:15:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:15:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 20:15:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:15:08,464 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 100 treesize of output 90 [2023-01-27 20:15:08,815 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 164 treesize of output 104 [2023-01-27 20:15:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:08,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:10,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:10,579 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 356 treesize of output 276 [2023-01-27 20:15:10,590 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 185 treesize of output 181 [2023-01-27 20:15:10,597 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 181 treesize of output 179 [2023-01-27 20:15:10,604 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 179 treesize of output 177 [2023-01-27 20:15:10,611 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 177 treesize of output 175 [2023-01-27 20:15:10,620 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 175 treesize of output 173 [2023-01-27 20:15:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280826058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:11,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-27 20:15:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150794425] [2023-01-27 20:15:11,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:15:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:15:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=661, Unknown=4, NotChecked=0, Total=756 [2023-01-27 20:15:11,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-01-27 20:15:11,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 3899 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:11,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:11,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-01-27 20:15:11,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:12,513 INFO L130 PetriNetUnfolder]: 812/1860 cut-off events. [2023-01-27 20:15:12,513 INFO L131 PetriNetUnfolder]: For 14241/14241 co-relation queries the response was YES. [2023-01-27 20:15:12,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 1860 events. 812/1860 cut-off events. For 14241/14241 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13453 event pairs, 178 based on Foata normal form. 5/1865 useless extension candidates. Maximal degree in co-relation 10851. Up to 824 conditions per place. [2023-01-27 20:15:12,523 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 183 selfloop transitions, 156 changer transitions 14/353 dead transitions. [2023-01-27 20:15:12,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 353 transitions, 5316 flow [2023-01-27 20:15:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:15:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:15:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2135 transitions. [2023-01-27 20:15:12,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165776986951364 [2023-01-27 20:15:12,526 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2135 transitions. [2023-01-27 20:15:12,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2135 transitions. [2023-01-27 20:15:12,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:12,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2135 transitions. [2023-01-27 20:15:12,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.91666666666666) internal successors, (2135), 12 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,531 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,531 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 3899 flow. Second operand 12 states and 2135 transitions. [2023-01-27 20:15:12,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 353 transitions, 5316 flow [2023-01-27 20:15:12,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 5058 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-01-27 20:15:12,610 INFO L231 Difference]: Finished difference. Result has 216 places, 304 transitions, 4374 flow [2023-01-27 20:15:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4374, PETRI_PLACES=216, PETRI_TRANSITIONS=304} [2023-01-27 20:15:12,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2023-01-27 20:15:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 304 transitions, 4374 flow [2023-01-27 20:15:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:12,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:12,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 20:15:12,811 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:12,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1888333352, now seen corresponding path program 10 times [2023-01-27 20:15:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330264347] [2023-01-27 20:15:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330264347] [2023-01-27 20:15:13,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330264347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849112110] [2023-01-27 20:15:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:15:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:13,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:13,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 20:15:13,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:15:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 20:15:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:15:13,698 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 42 treesize of output 40 [2023-01-27 20:15:13,875 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 170 treesize of output 110 [2023-01-27 20:15:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:14,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:15,336 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (forall ((v_ArrVal_748 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset))))) (.cse1 (< c_~i_4~0 3))) (and (or .cse0 (< 0 c_~result_3~0)) (or (and (< c_~result_3~0 0) (or (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~name_1~0 c_~name_2~0) .cse1)) (forall ((v_ArrVal_748 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) (or .cse0 (< c_~name_2~0 c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) .cse1)))) is different from false [2023-01-27 20:15:15,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:15,389 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 181 treesize of output 145 [2023-01-27 20:15:15,399 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 94 treesize of output 92 [2023-01-27 20:15:15,403 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 92 treesize of output 90 [2023-01-27 20:15:15,407 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 90 treesize of output 88 [2023-01-27 20:15:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849112110] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:15,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-27 20:15:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445121484] [2023-01-27 20:15:15,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:15:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:15:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-01-27 20:15:15,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-01-27 20:15:15,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 304 transitions, 4374 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:15,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:15,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-01-27 20:15:15,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:17,718 INFO L130 PetriNetUnfolder]: 810/1873 cut-off events. [2023-01-27 20:15:17,718 INFO L131 PetriNetUnfolder]: For 15319/15319 co-relation queries the response was YES. [2023-01-27 20:15:17,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 1873 events. 810/1873 cut-off events. For 15319/15319 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13750 event pairs, 167 based on Foata normal form. 35/1908 useless extension candidates. Maximal degree in co-relation 11128. Up to 771 conditions per place. [2023-01-27 20:15:17,731 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 225 selfloop transitions, 142 changer transitions 25/392 dead transitions. [2023-01-27 20:15:17,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 392 transitions, 5972 flow [2023-01-27 20:15:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:15:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:15:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2856 transitions. [2023-01-27 20:15:17,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761565836298933 [2023-01-27 20:15:17,734 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2856 transitions. [2023-01-27 20:15:17,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2856 transitions. [2023-01-27 20:15:17,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:17,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2856 transitions. [2023-01-27 20:15:17,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.5) internal successors, (2856), 16 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:17,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:17,740 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:17,740 INFO L175 Difference]: Start difference. First operand has 216 places, 304 transitions, 4374 flow. Second operand 16 states and 2856 transitions. [2023-01-27 20:15:17,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 392 transitions, 5972 flow [2023-01-27 20:15:17,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 392 transitions, 5854 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-01-27 20:15:17,824 INFO L231 Difference]: Finished difference. Result has 232 places, 315 transitions, 4888 flow [2023-01-27 20:15:17,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4888, PETRI_PLACES=232, PETRI_TRANSITIONS=315} [2023-01-27 20:15:17,824 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-01-27 20:15:17,824 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 315 transitions, 4888 flow [2023-01-27 20:15:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:17,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:17,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:17,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:18,025 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,SelfDestructingSolverStorable26 [2023-01-27 20:15:18,026 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:18,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash 869721443, now seen corresponding path program 11 times [2023-01-27 20:15:18,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:18,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50794466] [2023-01-27 20:15:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:18,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:18,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50794466] [2023-01-27 20:15:18,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50794466] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:18,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605875] [2023-01-27 20:15:18,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:15:18,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:18,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:18,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 20:15:18,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:15:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:18,696 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 84 treesize of output 52 [2023-01-27 20:15:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:18,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:18,887 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 20:15:18,887 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 40 treesize of output 19 [2023-01-27 20:15:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605875] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:18,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:18,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:15:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878227467] [2023-01-27 20:15:18,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:15:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:15:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:15:18,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:18,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 315 transitions, 4888 flow. Second operand has 18 states, 18 states have (on average 187.33333333333334) internal successors, (3372), 18 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:18,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:18,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:18,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:19,652 INFO L130 PetriNetUnfolder]: 800/1792 cut-off events. [2023-01-27 20:15:19,653 INFO L131 PetriNetUnfolder]: For 17105/17105 co-relation queries the response was YES. [2023-01-27 20:15:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 1792 events. 800/1792 cut-off events. For 17105/17105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12587 event pairs, 88 based on Foata normal form. 16/1808 useless extension candidates. Maximal degree in co-relation 11550. Up to 368 conditions per place. [2023-01-27 20:15:19,665 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 253 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2023-01-27 20:15:19,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 385 transitions, 6365 flow [2023-01-27 20:15:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:15:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:15:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2487 transitions. [2023-01-27 20:15:19,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404051464549685 [2023-01-27 20:15:19,671 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2487 transitions. [2023-01-27 20:15:19,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2487 transitions. [2023-01-27 20:15:19,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:19,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2487 transitions. [2023-01-27 20:15:19,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.30769230769232) internal successors, (2487), 13 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:19,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:19,677 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:19,677 INFO L175 Difference]: Start difference. First operand has 232 places, 315 transitions, 4888 flow. Second operand 13 states and 2487 transitions. [2023-01-27 20:15:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 385 transitions, 6365 flow [2023-01-27 20:15:19,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 385 transitions, 6137 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-01-27 20:15:19,782 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 5088 flow [2023-01-27 20:15:19,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5088, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2023-01-27 20:15:19,782 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-01-27 20:15:19,782 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 5088 flow [2023-01-27 20:15:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.33333333333334) internal successors, (3372), 18 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:19,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:19,783 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:19,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:19,988 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:19,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -780460431, now seen corresponding path program 12 times [2023-01-27 20:15:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719438762] [2023-01-27 20:15:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:15:20,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719438762] [2023-01-27 20:15:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719438762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:20,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892700618] [2023-01-27 20:15:20,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:15:20,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:20,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:20,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:20,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 20:15:20,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:15:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:20,939 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 17 treesize of output 9 [2023-01-27 20:15:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:20,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:21,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:21,206 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 44 treesize of output 28 [2023-01-27 20:15:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892700618] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:21,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:21,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-27 20:15:21,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505463778] [2023-01-27 20:15:21,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:15:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:15:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:15:21,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 562 [2023-01-27 20:15:21,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 5088 flow. Second operand has 23 states, 23 states have (on average 171.1304347826087) internal successors, (3936), 23 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:21,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:21,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 562 [2023-01-27 20:15:21,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:22,580 INFO L130 PetriNetUnfolder]: 1642/3655 cut-off events. [2023-01-27 20:15:22,580 INFO L131 PetriNetUnfolder]: For 34715/34715 co-relation queries the response was YES. [2023-01-27 20:15:22,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23751 conditions, 3655 events. 1642/3655 cut-off events. For 34715/34715 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29456 event pairs, 323 based on Foata normal form. 34/3689 useless extension candidates. Maximal degree in co-relation 23450. Up to 1002 conditions per place. [2023-01-27 20:15:22,610 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 538 selfloop transitions, 200 changer transitions 1/739 dead transitions. [2023-01-27 20:15:22,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 739 transitions, 12566 flow [2023-01-27 20:15:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:15:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:15:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3857 transitions. [2023-01-27 20:15:22,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31195406017470073 [2023-01-27 20:15:22,614 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3857 transitions. [2023-01-27 20:15:22,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3857 transitions. [2023-01-27 20:15:22,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:22,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3857 transitions. [2023-01-27 20:15:22,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 175.3181818181818) internal successors, (3857), 22 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,623 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,623 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 5088 flow. Second operand 22 states and 3857 transitions. [2023-01-27 20:15:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 739 transitions, 12566 flow [2023-01-27 20:15:22,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 739 transitions, 12386 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-01-27 20:15:22,888 INFO L231 Difference]: Finished difference. Result has 261 places, 437 transitions, 7906 flow [2023-01-27 20:15:22,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7906, PETRI_PLACES=261, PETRI_TRANSITIONS=437} [2023-01-27 20:15:22,888 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-01-27 20:15:22,889 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 437 transitions, 7906 flow [2023-01-27 20:15:22,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 171.1304347826087) internal successors, (3936), 23 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:22,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:22,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:23,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 20:15:23,091 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:23,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1335210813, now seen corresponding path program 13 times [2023-01-27 20:15:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614723602] [2023-01-27 20:15:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:23,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:23,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:23,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614723602] [2023-01-27 20:15:23,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614723602] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:23,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778889459] [2023-01-27 20:15:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:15:23,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:23,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:23,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 20:15:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:23,902 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 112 treesize of output 80 [2023-01-27 20:15:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:24,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:24,166 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 44 treesize of output 28 [2023-01-27 20:15:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778889459] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:24,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:24,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-01-27 20:15:24,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113358516] [2023-01-27 20:15:24,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:24,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:15:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:15:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:15:24,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:15:24,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 437 transitions, 7906 flow. Second operand has 19 states, 19 states have (on average 178.1578947368421) internal successors, (3385), 19 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:24,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:24,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:15:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:25,643 INFO L130 PetriNetUnfolder]: 1660/3697 cut-off events. [2023-01-27 20:15:25,643 INFO L131 PetriNetUnfolder]: For 40990/40990 co-relation queries the response was YES. [2023-01-27 20:15:25,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24822 conditions, 3697 events. 1660/3697 cut-off events. For 40990/40990 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30131 event pairs, 377 based on Foata normal form. 8/3705 useless extension candidates. Maximal degree in co-relation 24454. Up to 1254 conditions per place. [2023-01-27 20:15:25,670 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 288 selfloop transitions, 209 changer transitions 3/500 dead transitions. [2023-01-27 20:15:25,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 500 transitions, 9491 flow [2023-01-27 20:15:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:15:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:15:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3088 transitions. [2023-01-27 20:15:25,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323215407159305 [2023-01-27 20:15:25,673 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3088 transitions. [2023-01-27 20:15:25,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3088 transitions. [2023-01-27 20:15:25,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:25,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3088 transitions. [2023-01-27 20:15:25,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.64705882352942) internal successors, (3088), 17 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:25,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:25,680 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:25,680 INFO L175 Difference]: Start difference. First operand has 261 places, 437 transitions, 7906 flow. Second operand 17 states and 3088 transitions. [2023-01-27 20:15:25,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 500 transitions, 9491 flow [2023-01-27 20:15:25,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 500 transitions, 9448 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-01-27 20:15:25,977 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 8445 flow [2023-01-27 20:15:25,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8445, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2023-01-27 20:15:25,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-01-27 20:15:25,977 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 8445 flow [2023-01-27 20:15:25,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 178.1578947368421) internal successors, (3385), 19 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:25,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:25,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:25,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:26,185 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:26,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1635767085, now seen corresponding path program 14 times [2023-01-27 20:15:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185044031] [2023-01-27 20:15:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185044031] [2023-01-27 20:15:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185044031] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886620464] [2023-01-27 20:15:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:15:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:26,504 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:26,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 20:15:26,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:15:26,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:15:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:26,797 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 133 treesize of output 93 [2023-01-27 20:15:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:26,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:27,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:27,078 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 44 treesize of output 28 [2023-01-27 20:15:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:27,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886620464] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:27,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:27,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-27 20:15:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932861857] [2023-01-27 20:15:27,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:27,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 20:15:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 20:15:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:15:27,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:27,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 8445 flow. Second operand has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:27,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:27,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:27,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:28,351 INFO L130 PetriNetUnfolder]: 1666/3695 cut-off events. [2023-01-27 20:15:28,352 INFO L131 PetriNetUnfolder]: For 45512/45512 co-relation queries the response was YES. [2023-01-27 20:15:28,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25608 conditions, 3695 events. 1666/3695 cut-off events. For 45512/45512 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29995 event pairs, 375 based on Foata normal form. 12/3707 useless extension candidates. Maximal degree in co-relation 25502. Up to 1278 conditions per place. [2023-01-27 20:15:28,374 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 304 selfloop transitions, 195 changer transitions 0/499 dead transitions. [2023-01-27 20:15:28,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9958 flow [2023-01-27 20:15:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:15:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:15:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2678 transitions. [2023-01-27 20:15:28,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403660396542959 [2023-01-27 20:15:28,377 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2678 transitions. [2023-01-27 20:15:28,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2678 transitions. [2023-01-27 20:15:28,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:28,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2678 transitions. [2023-01-27 20:15:28,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 191.28571428571428) internal successors, (2678), 14 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:28,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:28,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:28,383 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 8445 flow. Second operand 14 states and 2678 transitions. [2023-01-27 20:15:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9958 flow [2023-01-27 20:15:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9783 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-01-27 20:15:28,690 INFO L231 Difference]: Finished difference. Result has 278 places, 444 transitions, 8751 flow [2023-01-27 20:15:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8751, PETRI_PLACES=278, PETRI_TRANSITIONS=444} [2023-01-27 20:15:28,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-27 20:15:28,691 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 444 transitions, 8751 flow [2023-01-27 20:15:28,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:28,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:28,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:28,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:28,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:28,893 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:28,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2050404756, now seen corresponding path program 15 times [2023-01-27 20:15:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:28,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30006604] [2023-01-27 20:15:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:15:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30006604] [2023-01-27 20:15:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30006604] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161138417] [2023-01-27 20:15:29,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:15:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:29,393 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:29,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 20:15:29,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:15:29,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:15:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:29,682 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 91 treesize of output 59 [2023-01-27 20:15:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:29,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:29,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:29,948 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 87 treesize of output 47 [2023-01-27 20:15:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:30,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161138417] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:30,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:30,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-27 20:15:30,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208204592] [2023-01-27 20:15:30,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:30,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:15:30,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:30,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:15:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:15:30,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 562 [2023-01-27 20:15:30,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 444 transitions, 8751 flow. Second operand has 23 states, 23 states have (on average 170.95652173913044) internal successors, (3932), 23 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:30,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:30,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 562 [2023-01-27 20:15:30,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:31,551 INFO L130 PetriNetUnfolder]: 1654/3651 cut-off events. [2023-01-27 20:15:31,551 INFO L131 PetriNetUnfolder]: For 48293/48293 co-relation queries the response was YES. [2023-01-27 20:15:31,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25810 conditions, 3651 events. 1654/3651 cut-off events. For 48293/48293 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29318 event pairs, 267 based on Foata normal form. 24/3675 useless extension candidates. Maximal degree in co-relation 25704. Up to 691 conditions per place. [2023-01-27 20:15:31,580 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 460 selfloop transitions, 259 changer transitions 2/721 dead transitions. [2023-01-27 20:15:31,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 721 transitions, 13789 flow [2023-01-27 20:15:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:15:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:15:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4870 transitions. [2023-01-27 20:15:31,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30948144382308085 [2023-01-27 20:15:31,584 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4870 transitions. [2023-01-27 20:15:31,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4870 transitions. [2023-01-27 20:15:31,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:31,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4870 transitions. [2023-01-27 20:15:31,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 173.92857142857142) internal successors, (4870), 28 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:31,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:31,594 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:31,594 INFO L175 Difference]: Start difference. First operand has 278 places, 444 transitions, 8751 flow. Second operand 28 states and 4870 transitions. [2023-01-27 20:15:31,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 721 transitions, 13789 flow [2023-01-27 20:15:31,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 721 transitions, 13367 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-01-27 20:15:31,975 INFO L231 Difference]: Finished difference. Result has 294 places, 515 transitions, 10243 flow [2023-01-27 20:15:31,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10243, PETRI_PLACES=294, PETRI_TRANSITIONS=515} [2023-01-27 20:15:31,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-01-27 20:15:31,976 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 515 transitions, 10243 flow [2023-01-27 20:15:31,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 170.95652173913044) internal successors, (3932), 23 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:31,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:31,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:31,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:32,177 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:32,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:32,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1594385250, now seen corresponding path program 16 times [2023-01-27 20:15:32,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:32,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227816911] [2023-01-27 20:15:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:15:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227816911] [2023-01-27 20:15:32,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227816911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638525175] [2023-01-27 20:15:32,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:15:32,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:32,690 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:32,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 20:15:32,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:15:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:33,079 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 72 treesize of output 48 [2023-01-27 20:15:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:33,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:33,289 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 125 treesize of output 69 [2023-01-27 20:15:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638525175] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:33,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:33,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-01-27 20:15:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214011565] [2023-01-27 20:15:33,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:15:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:15:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:15:33,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-27 20:15:33,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 515 transitions, 10243 flow. Second operand has 24 states, 24 states have (on average 175.0) internal successors, (4200), 24 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:33,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:33,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-27 20:15:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:34,560 INFO L130 PetriNetUnfolder]: 1610/3547 cut-off events. [2023-01-27 20:15:34,561 INFO L131 PetriNetUnfolder]: For 49090/49090 co-relation queries the response was YES. [2023-01-27 20:15:34,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3547 events. 1610/3547 cut-off events. For 49090/49090 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28326 event pairs, 721 based on Foata normal form. 8/3555 useless extension candidates. Maximal degree in co-relation 25418. Up to 3296 conditions per place. [2023-01-27 20:15:34,588 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 433 selfloop transitions, 82 changer transitions 10/525 dead transitions. [2023-01-27 20:15:34,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 525 transitions, 11303 flow [2023-01-27 20:15:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:15:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:15:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1951 transitions. [2023-01-27 20:15:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155936590100291 [2023-01-27 20:15:34,590 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1951 transitions. [2023-01-27 20:15:34,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1951 transitions. [2023-01-27 20:15:34,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:34,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1951 transitions. [2023-01-27 20:15:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.36363636363637) internal successors, (1951), 11 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:34,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:34,594 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:34,594 INFO L175 Difference]: Start difference. First operand has 294 places, 515 transitions, 10243 flow. Second operand 11 states and 1951 transitions. [2023-01-27 20:15:34,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 525 transitions, 11303 flow [2023-01-27 20:15:34,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 525 transitions, 11051 flow, removed 37 selfloop flow, removed 16 redundant places. [2023-01-27 20:15:34,951 INFO L231 Difference]: Finished difference. Result has 288 places, 505 transitions, 9993 flow [2023-01-27 20:15:34,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9993, PETRI_PLACES=288, PETRI_TRANSITIONS=505} [2023-01-27 20:15:34,952 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-01-27 20:15:34,952 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 505 transitions, 9993 flow [2023-01-27 20:15:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 175.0) internal successors, (4200), 24 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:34,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:34,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:34,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:35,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:35,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:35,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash -86174668, now seen corresponding path program 17 times [2023-01-27 20:15:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:35,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497973252] [2023-01-27 20:15:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:35,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497973252] [2023-01-27 20:15:35,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497973252] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045935909] [2023-01-27 20:15:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:15:35,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:35,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:35,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 20:15:35,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:15:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:15:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:35,735 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 70 treesize of output 46 [2023-01-27 20:15:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:35,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:35,940 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 66 treesize of output 42 [2023-01-27 20:15:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:35,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045935909] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:35,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:35,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:15:35,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541947245] [2023-01-27 20:15:35,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:35,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:15:35,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:15:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:15:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:35,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 505 transitions, 9993 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:35,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:35,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:37,222 INFO L130 PetriNetUnfolder]: 1664/3685 cut-off events. [2023-01-27 20:15:37,222 INFO L131 PetriNetUnfolder]: For 49457/49457 co-relation queries the response was YES. [2023-01-27 20:15:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26534 conditions, 3685 events. 1664/3685 cut-off events. For 49457/49457 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29781 event pairs, 267 based on Foata normal form. 16/3701 useless extension candidates. Maximal degree in co-relation 26427. Up to 1161 conditions per place. [2023-01-27 20:15:37,253 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 297 selfloop transitions, 265 changer transitions 1/563 dead transitions. [2023-01-27 20:15:37,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 563 transitions, 11867 flow [2023-01-27 20:15:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:15:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:15:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2291 transitions. [2023-01-27 20:15:37,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33970937129300116 [2023-01-27 20:15:37,256 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2291 transitions. [2023-01-27 20:15:37,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2291 transitions. [2023-01-27 20:15:37,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:37,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2291 transitions. [2023-01-27 20:15:37,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.91666666666666) internal successors, (2291), 12 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:37,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:37,261 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:37,261 INFO L175 Difference]: Start difference. First operand has 288 places, 505 transitions, 9993 flow. Second operand 12 states and 2291 transitions. [2023-01-27 20:15:37,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 563 transitions, 11867 flow [2023-01-27 20:15:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 563 transitions, 11697 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-01-27 20:15:37,683 INFO L231 Difference]: Finished difference. Result has 285 places, 520 transitions, 10782 flow [2023-01-27 20:15:37,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10782, PETRI_PLACES=285, PETRI_TRANSITIONS=520} [2023-01-27 20:15:37,684 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-01-27 20:15:37,684 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 520 transitions, 10782 flow [2023-01-27 20:15:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:37,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:37,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:37,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:37,884 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,SelfDestructingSolverStorable33 [2023-01-27 20:15:37,885 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:37,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 450395604, now seen corresponding path program 18 times [2023-01-27 20:15:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823001872] [2023-01-27 20:15:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823001872] [2023-01-27 20:15:38,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823001872] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874625503] [2023-01-27 20:15:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:15:38,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:38,203 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:38,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 20:15:38,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:15:38,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:38,521 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 84 treesize of output 52 [2023-01-27 20:15:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:38,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:38,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:38,739 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 65 treesize of output 41 [2023-01-27 20:15:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874625503] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:38,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-27 20:15:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875425304] [2023-01-27 20:15:38,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:15:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:15:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:15:38,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:38,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 520 transitions, 10782 flow. Second operand has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:38,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:38,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:39,787 INFO L130 PetriNetUnfolder]: 1620/3545 cut-off events. [2023-01-27 20:15:39,787 INFO L131 PetriNetUnfolder]: For 53008/53008 co-relation queries the response was YES. [2023-01-27 20:15:39,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3545 events. 1620/3545 cut-off events. For 53008/53008 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28137 event pairs, 733 based on Foata normal form. 20/3565 useless extension candidates. Maximal degree in co-relation 26369. Up to 3315 conditions per place. [2023-01-27 20:15:39,819 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 440 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2023-01-27 20:15:39,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 522 transitions, 11724 flow [2023-01-27 20:15:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:15:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:15:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1520 transitions. [2023-01-27 20:15:39,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-27 20:15:39,821 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1520 transitions. [2023-01-27 20:15:39,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1520 transitions. [2023-01-27 20:15:39,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:39,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1520 transitions. [2023-01-27 20:15:39,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:39,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:39,824 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:39,824 INFO L175 Difference]: Start difference. First operand has 285 places, 520 transitions, 10782 flow. Second operand 8 states and 1520 transitions. [2023-01-27 20:15:39,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 522 transitions, 11724 flow [2023-01-27 20:15:40,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 522 transitions, 11255 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-01-27 20:15:40,161 INFO L231 Difference]: Finished difference. Result has 283 places, 512 transitions, 10327 flow [2023-01-27 20:15:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10327, PETRI_PLACES=283, PETRI_TRANSITIONS=512} [2023-01-27 20:15:40,161 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-01-27 20:15:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 512 transitions, 10327 flow [2023-01-27 20:15:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:40,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:40,362 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,SelfDestructingSolverStorable34 [2023-01-27 20:15:40,362 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:40,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 801329013, now seen corresponding path program 19 times [2023-01-27 20:15:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198100087] [2023-01-27 20:15:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:40,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198100087] [2023-01-27 20:15:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198100087] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:40,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102469131] [2023-01-27 20:15:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:15:40,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:40,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:40,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 20:15:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:15:40,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:40,911 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 91 treesize of output 59 [2023-01-27 20:15:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:40,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:41,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:41,159 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 117 treesize of output 61 [2023-01-27 20:15:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102469131] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:41,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:15:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379260253] [2023-01-27 20:15:41,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:15:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:15:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:15:41,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:41,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 512 transitions, 10327 flow. Second operand has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:41,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:41,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:41,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:42,199 INFO L130 PetriNetUnfolder]: 1608/3501 cut-off events. [2023-01-27 20:15:42,200 INFO L131 PetriNetUnfolder]: For 49239/49239 co-relation queries the response was YES. [2023-01-27 20:15:42,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3501 events. 1608/3501 cut-off events. For 49239/49239 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27571 event pairs, 463 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25599. Up to 2377 conditions per place. [2023-01-27 20:15:42,228 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 372 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2023-01-27 20:15:42,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 527 transitions, 11368 flow [2023-01-27 20:15:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:15:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:15:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2090 transitions. [2023-01-27 20:15:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-27 20:15:42,230 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2090 transitions. [2023-01-27 20:15:42,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2090 transitions. [2023-01-27 20:15:42,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:42,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2090 transitions. [2023-01-27 20:15:42,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0) internal successors, (2090), 11 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:42,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:42,234 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:42,234 INFO L175 Difference]: Start difference. First operand has 283 places, 512 transitions, 10327 flow. Second operand 11 states and 2090 transitions. [2023-01-27 20:15:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 527 transitions, 11368 flow [2023-01-27 20:15:42,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 527 transitions, 11235 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-01-27 20:15:42,560 INFO L231 Difference]: Finished difference. Result has 286 places, 508 transitions, 10428 flow [2023-01-27 20:15:42,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10118, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10428, PETRI_PLACES=286, PETRI_TRANSITIONS=508} [2023-01-27 20:15:42,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2023-01-27 20:15:42,561 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 508 transitions, 10428 flow [2023-01-27 20:15:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:42,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:42,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:42,763 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:42,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1868073493, now seen corresponding path program 20 times [2023-01-27 20:15:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030607610] [2023-01-27 20:15:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:15:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030607610] [2023-01-27 20:15:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030607610] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356192689] [2023-01-27 20:15:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:15:43,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:43,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:43,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 20:15:43,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:15:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:43,585 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 133 treesize of output 93 [2023-01-27 20:15:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:43,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:43,848 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 65 treesize of output 41 [2023-01-27 20:15:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:43,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356192689] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:43,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:43,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-27 20:15:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285205709] [2023-01-27 20:15:43,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:15:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:15:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:15:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-27 20:15:43,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 508 transitions, 10428 flow. Second operand has 23 states, 23 states have (on average 174.91304347826087) internal successors, (4023), 23 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:43,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:43,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-27 20:15:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:45,188 INFO L130 PetriNetUnfolder]: 1658/3639 cut-off events. [2023-01-27 20:15:45,188 INFO L131 PetriNetUnfolder]: For 54497/54497 co-relation queries the response was YES. [2023-01-27 20:15:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27126 conditions, 3639 events. 1658/3639 cut-off events. For 54497/54497 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29189 event pairs, 639 based on Foata normal form. 16/3655 useless extension candidates. Maximal degree in co-relation 27019. Up to 3084 conditions per place. [2023-01-27 20:15:45,218 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 458 selfloop transitions, 108 changer transitions 0/566 dead transitions. [2023-01-27 20:15:45,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 566 transitions, 12091 flow [2023-01-27 20:15:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:15:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:15:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2502 transitions. [2023-01-27 20:15:45,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31799694966954756 [2023-01-27 20:15:45,220 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2502 transitions. [2023-01-27 20:15:45,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2502 transitions. [2023-01-27 20:15:45,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:45,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2502 transitions. [2023-01-27 20:15:45,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.71428571428572) internal successors, (2502), 14 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:45,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:45,225 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:45,225 INFO L175 Difference]: Start difference. First operand has 286 places, 508 transitions, 10428 flow. Second operand 14 states and 2502 transitions. [2023-01-27 20:15:45,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 566 transitions, 12091 flow [2023-01-27 20:15:45,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 566 transitions, 11893 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-27 20:15:45,609 INFO L231 Difference]: Finished difference. Result has 292 places, 518 transitions, 10716 flow [2023-01-27 20:15:45,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10716, PETRI_PLACES=292, PETRI_TRANSITIONS=518} [2023-01-27 20:15:45,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-01-27 20:15:45,610 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 518 transitions, 10716 flow [2023-01-27 20:15:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 174.91304347826087) internal successors, (4023), 23 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:45,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:45,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:45,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:45,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:45,813 INFO L85 PathProgramCache]: Analyzing trace with hash -494622950, now seen corresponding path program 21 times [2023-01-27 20:15:45,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:45,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664068328] [2023-01-27 20:15:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:45,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664068328] [2023-01-27 20:15:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664068328] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180830278] [2023-01-27 20:15:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:15:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:46,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 20:15:46,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:15:46,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 20:15:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:46,475 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 131 treesize of output 91 [2023-01-27 20:15:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:46,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:46,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:46,694 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 65 treesize of output 41 [2023-01-27 20:15:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:46,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180830278] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:46,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:46,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:15:46,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389605293] [2023-01-27 20:15:46,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:46,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:15:46,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:15:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:15:46,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:46,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 518 transitions, 10716 flow. Second operand has 18 states, 18 states have (on average 187.27777777777777) internal successors, (3371), 18 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:46,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:46,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:46,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:47,794 INFO L130 PetriNetUnfolder]: 1698/3775 cut-off events. [2023-01-27 20:15:47,794 INFO L131 PetriNetUnfolder]: For 59878/59878 co-relation queries the response was YES. [2023-01-27 20:15:47,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28252 conditions, 3775 events. 1698/3775 cut-off events. For 59878/59878 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30886 event pairs, 689 based on Foata normal form. 24/3799 useless extension candidates. Maximal degree in co-relation 28141. Up to 3271 conditions per place. [2023-01-27 20:15:47,821 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 438 selfloop transitions, 114 changer transitions 5/557 dead transitions. [2023-01-27 20:15:47,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 557 transitions, 12420 flow [2023-01-27 20:15:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:15:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:15:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2090 transitions. [2023-01-27 20:15:47,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-27 20:15:47,823 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2090 transitions. [2023-01-27 20:15:47,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2090 transitions. [2023-01-27 20:15:47,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:47,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2090 transitions. [2023-01-27 20:15:47,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0) internal successors, (2090), 11 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:47,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:47,827 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:47,827 INFO L175 Difference]: Start difference. First operand has 292 places, 518 transitions, 10716 flow. Second operand 11 states and 2090 transitions. [2023-01-27 20:15:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 557 transitions, 12420 flow [2023-01-27 20:15:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 557 transitions, 12221 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-01-27 20:15:48,200 INFO L231 Difference]: Finished difference. Result has 297 places, 530 transitions, 11174 flow [2023-01-27 20:15:48,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10487, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11174, PETRI_PLACES=297, PETRI_TRANSITIONS=530} [2023-01-27 20:15:48,200 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-01-27 20:15:48,201 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 530 transitions, 11174 flow [2023-01-27 20:15:48,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.27777777777777) internal successors, (3371), 18 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:48,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:48,201 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:48,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-27 20:15:48,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 20:15:48,406 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:48,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash 202279714, now seen corresponding path program 22 times [2023-01-27 20:15:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036581237] [2023-01-27 20:15:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:48,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036581237] [2023-01-27 20:15:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036581237] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355435443] [2023-01-27 20:15:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:15:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:48,693 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:48,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 20:15:48,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:15:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:15:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:49,000 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 84 treesize of output 52 [2023-01-27 20:15:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:49,216 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 20:15:49,216 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 40 treesize of output 19 [2023-01-27 20:15:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355435443] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:49,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-27 20:15:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705919426] [2023-01-27 20:15:49,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 20:15:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 20:15:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:15:49,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:49,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 530 transitions, 11174 flow. Second operand has 17 states, 17 states have (on average 187.2941176470588) internal successors, (3184), 17 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:49,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:49,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:49,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:50,475 INFO L130 PetriNetUnfolder]: 1772/3925 cut-off events. [2023-01-27 20:15:50,475 INFO L131 PetriNetUnfolder]: For 60235/60235 co-relation queries the response was YES. [2023-01-27 20:15:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29498 conditions, 3925 events. 1772/3925 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32314 event pairs, 82 based on Foata normal form. 24/3949 useless extension candidates. Maximal degree in co-relation 29385. Up to 1276 conditions per place. [2023-01-27 20:15:50,507 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 317 selfloop transitions, 289 changer transitions 3/609 dead transitions. [2023-01-27 20:15:50,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 609 transitions, 13470 flow [2023-01-27 20:15:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:15:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:15:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2293 transitions. [2023-01-27 20:15:50,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340005931198102 [2023-01-27 20:15:50,509 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2293 transitions. [2023-01-27 20:15:50,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2293 transitions. [2023-01-27 20:15:50,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:50,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2293 transitions. [2023-01-27 20:15:50,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.08333333333334) internal successors, (2293), 12 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:50,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:50,514 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:50,514 INFO L175 Difference]: Start difference. First operand has 297 places, 530 transitions, 11174 flow. Second operand 12 states and 2293 transitions. [2023-01-27 20:15:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 609 transitions, 13470 flow [2023-01-27 20:15:50,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 609 transitions, 13209 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-01-27 20:15:50,982 INFO L231 Difference]: Finished difference. Result has 300 places, 551 transitions, 12098 flow [2023-01-27 20:15:50,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12098, PETRI_PLACES=300, PETRI_TRANSITIONS=551} [2023-01-27 20:15:50,983 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-01-27 20:15:50,983 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 551 transitions, 12098 flow [2023-01-27 20:15:50,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.2941176470588) internal successors, (3184), 17 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:50,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:50,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:50,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:51,184 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,SelfDestructingSolverStorable38 [2023-01-27 20:15:51,184 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:51,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 222542276, now seen corresponding path program 23 times [2023-01-27 20:15:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517700379] [2023-01-27 20:15:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517700379] [2023-01-27 20:15:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517700379] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063418037] [2023-01-27 20:15:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:15:51,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:51,492 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:51,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 20:15:51,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:15:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 20:15:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:51,811 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 133 treesize of output 93 [2023-01-27 20:15:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:52,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:52,072 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 44 treesize of output 28 [2023-01-27 20:15:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063418037] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:52,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-27 20:15:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719267305] [2023-01-27 20:15:52,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:15:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:15:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:15:52,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:52,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 551 transitions, 12098 flow. Second operand has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:52,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:52,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:54,246 INFO L130 PetriNetUnfolder]: 1778/3935 cut-off events. [2023-01-27 20:15:54,246 INFO L131 PetriNetUnfolder]: For 64668/64668 co-relation queries the response was YES. [2023-01-27 20:15:54,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3935 events. 1778/3935 cut-off events. For 64668/64668 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32581 event pairs, 38 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 30391. Up to 948 conditions per place. [2023-01-27 20:15:54,273 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 338 selfloop transitions, 315 changer transitions 0/653 dead transitions. [2023-01-27 20:15:54,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 14610 flow [2023-01-27 20:15:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 20:15:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 20:15:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4747 transitions. [2023-01-27 20:15:54,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786476868327403 [2023-01-27 20:15:54,276 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4747 transitions. [2023-01-27 20:15:54,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4747 transitions. [2023-01-27 20:15:54,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:54,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4747 transitions. [2023-01-27 20:15:54,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 189.88) internal successors, (4747), 25 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:54,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:54,285 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:54,285 INFO L175 Difference]: Start difference. First operand has 300 places, 551 transitions, 12098 flow. Second operand 25 states and 4747 transitions. [2023-01-27 20:15:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 14610 flow [2023-01-27 20:15:54,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 653 transitions, 14329 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-01-27 20:15:54,772 INFO L231 Difference]: Finished difference. Result has 323 places, 577 transitions, 13320 flow [2023-01-27 20:15:54,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13320, PETRI_PLACES=323, PETRI_TRANSITIONS=577} [2023-01-27 20:15:54,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-01-27 20:15:54,773 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 577 transitions, 13320 flow [2023-01-27 20:15:54,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:54,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:54,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:54,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:54,975 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,SelfDestructingSolverStorable39 [2023-01-27 20:15:54,975 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:54,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash -632764378, now seen corresponding path program 24 times [2023-01-27 20:15:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:54,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178240663] [2023-01-27 20:15:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:55,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:55,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178240663] [2023-01-27 20:15:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178240663] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229472115] [2023-01-27 20:15:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:15:55,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:55,257 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:55,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 20:15:55,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:15:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:15:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:55,624 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 17 treesize of output 9 [2023-01-27 20:15:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:55,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:55,846 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 44 treesize of output 28 [2023-01-27 20:15:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229472115] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:55,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:55,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:15:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231701923] [2023-01-27 20:15:55,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:15:55,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:15:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:15:55,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:15:55,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 577 transitions, 13320 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:55,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:55,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:15:55,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:57,127 INFO L130 PetriNetUnfolder]: 1766/3855 cut-off events. [2023-01-27 20:15:57,127 INFO L131 PetriNetUnfolder]: For 68093/68093 co-relation queries the response was YES. [2023-01-27 20:15:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 3855 events. 1766/3855 cut-off events. For 68093/68093 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31320 event pairs, 74 based on Foata normal form. 20/3875 useless extension candidates. Maximal degree in co-relation 31527. Up to 2058 conditions per place. [2023-01-27 20:15:57,159 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 387 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2023-01-27 20:15:57,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 604 transitions, 14747 flow [2023-01-27 20:15:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:15:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:15:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1906 transitions. [2023-01-27 20:15:57,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391459074733096 [2023-01-27 20:15:57,161 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1906 transitions. [2023-01-27 20:15:57,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1906 transitions. [2023-01-27 20:15:57,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:57,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1906 transitions. [2023-01-27 20:15:57,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.6) internal successors, (1906), 10 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:57,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:57,164 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:57,164 INFO L175 Difference]: Start difference. First operand has 323 places, 577 transitions, 13320 flow. Second operand 10 states and 1906 transitions. [2023-01-27 20:15:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 604 transitions, 14747 flow [2023-01-27 20:15:57,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 604 transitions, 13886 flow, removed 159 selfloop flow, removed 23 redundant places. [2023-01-27 20:15:57,744 INFO L231 Difference]: Finished difference. Result has 308 places, 573 transitions, 12912 flow [2023-01-27 20:15:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12912, PETRI_PLACES=308, PETRI_TRANSITIONS=573} [2023-01-27 20:15:57,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-27 20:15:57,744 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 573 transitions, 12912 flow [2023-01-27 20:15:57,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:57,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:57,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:57,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 20:15:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:57,945 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:15:57,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash 937006002, now seen corresponding path program 25 times [2023-01-27 20:15:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231155711] [2023-01-27 20:15:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:15:58,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231155711] [2023-01-27 20:15:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231155711] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997490605] [2023-01-27 20:15:58,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:15:58,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:58,419 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:15:58,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 20:15:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:15:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:58,749 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 105 treesize of output 65 [2023-01-27 20:15:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:58,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:58,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:58,985 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 62 treesize of output 38 [2023-01-27 20:15:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997490605] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:59,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:59,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 21 [2023-01-27 20:15:59,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876228979] [2023-01-27 20:15:59,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:15:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:15:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:15:59,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-27 20:15:59,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 573 transitions, 12912 flow. Second operand has 21 states, 21 states have (on average 175.0) internal successors, (3675), 21 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:59,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:59,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-27 20:15:59,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:00,347 INFO L130 PetriNetUnfolder]: 1786/3867 cut-off events. [2023-01-27 20:16:00,347 INFO L131 PetriNetUnfolder]: For 66159/66159 co-relation queries the response was YES. [2023-01-27 20:16:00,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31108 conditions, 3867 events. 1786/3867 cut-off events. For 66159/66159 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31135 event pairs, 349 based on Foata normal form. 24/3891 useless extension candidates. Maximal degree in co-relation 31001. Up to 1532 conditions per place. [2023-01-27 20:16:00,378 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 386 selfloop transitions, 221 changer transitions 1/608 dead transitions. [2023-01-27 20:16:00,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 608 transitions, 14493 flow [2023-01-27 20:16:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:16:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:16:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2308 transitions. [2023-01-27 20:16:00,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31590473583356143 [2023-01-27 20:16:00,381 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2308 transitions. [2023-01-27 20:16:00,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2308 transitions. [2023-01-27 20:16:00,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:00,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2308 transitions. [2023-01-27 20:16:00,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.53846153846155) internal successors, (2308), 13 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,386 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,386 INFO L175 Difference]: Start difference. First operand has 308 places, 573 transitions, 12912 flow. Second operand 13 states and 2308 transitions. [2023-01-27 20:16:00,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 608 transitions, 14493 flow [2023-01-27 20:16:00,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 608 transitions, 14062 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-01-27 20:16:00,899 INFO L231 Difference]: Finished difference. Result has 313 places, 577 transitions, 13031 flow [2023-01-27 20:16:00,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12421, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13031, PETRI_PLACES=313, PETRI_TRANSITIONS=577} [2023-01-27 20:16:00,899 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-27 20:16:00,900 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 577 transitions, 13031 flow [2023-01-27 20:16:00,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 175.0) internal successors, (3675), 21 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:00,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:00,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-27 20:16:01,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:01,101 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:01,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1238315755, now seen corresponding path program 26 times [2023-01-27 20:16:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:01,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293484533] [2023-01-27 20:16:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293484533] [2023-01-27 20:16:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293484533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733779969] [2023-01-27 20:16:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:16:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:01,392 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:01,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 20:16:01,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:16:01,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:16:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:01,709 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 112 treesize of output 80 [2023-01-27 20:16:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:01,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:01,968 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 95 treesize of output 55 [2023-01-27 20:16:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733779969] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:02,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:02,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:16:02,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677592338] [2023-01-27 20:16:02,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:16:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:16:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:16:02,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:02,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 577 transitions, 13031 flow. Second operand has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:02,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:02,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:02,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:03,163 INFO L130 PetriNetUnfolder]: 1774/3823 cut-off events. [2023-01-27 20:16:03,164 INFO L131 PetriNetUnfolder]: For 68701/68701 co-relation queries the response was YES. [2023-01-27 20:16:03,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30936 conditions, 3823 events. 1774/3823 cut-off events. For 68701/68701 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30611 event pairs, 749 based on Foata normal form. 4/3827 useless extension candidates. Maximal degree in co-relation 30827. Up to 3467 conditions per place. [2023-01-27 20:16:03,197 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 499 selfloop transitions, 92 changer transitions 0/591 dead transitions. [2023-01-27 20:16:03,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 591 transitions, 14198 flow [2023-01-27 20:16:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:16:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:16:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1901 transitions. [2023-01-27 20:16:03,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382562277580071 [2023-01-27 20:16:03,199 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1901 transitions. [2023-01-27 20:16:03,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1901 transitions. [2023-01-27 20:16:03,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:03,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1901 transitions. [2023-01-27 20:16:03,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.1) internal successors, (1901), 10 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:03,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:03,202 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:03,203 INFO L175 Difference]: Start difference. First operand has 313 places, 577 transitions, 13031 flow. Second operand 10 states and 1901 transitions. [2023-01-27 20:16:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 591 transitions, 14198 flow [2023-01-27 20:16:03,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 591 transitions, 13948 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-01-27 20:16:03,738 INFO L231 Difference]: Finished difference. Result has 311 places, 573 transitions, 12880 flow [2023-01-27 20:16:03,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12696, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12880, PETRI_PLACES=311, PETRI_TRANSITIONS=573} [2023-01-27 20:16:03,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-01-27 20:16:03,739 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 573 transitions, 12880 flow [2023-01-27 20:16:03,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:03,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:03,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:03,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:03,940 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:03,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 852990556, now seen corresponding path program 27 times [2023-01-27 20:16:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609501127] [2023-01-27 20:16:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609501127] [2023-01-27 20:16:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609501127] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381709264] [2023-01-27 20:16:04,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:16:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:04,282 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:04,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 20:16:04,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:16:04,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:04,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:16:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:04,602 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 112 treesize of output 80 [2023-01-27 20:16:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:04,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:04,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:04,882 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 65 treesize of output 41 [2023-01-27 20:16:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381709264] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:04,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 20:16:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528537488] [2023-01-27 20:16:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:16:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:16:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:16:04,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:04,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 573 transitions, 12880 flow. Second operand has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:04,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:04,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:04,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:06,115 INFO L130 PetriNetUnfolder]: 1766/3759 cut-off events. [2023-01-27 20:16:06,116 INFO L131 PetriNetUnfolder]: For 66182/66182 co-relation queries the response was YES. [2023-01-27 20:16:06,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30583 conditions, 3759 events. 1766/3759 cut-off events. For 66182/66182 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29660 event pairs, 711 based on Foata normal form. 16/3775 useless extension candidates. Maximal degree in co-relation 30475. Up to 3341 conditions per place. [2023-01-27 20:16:06,143 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 470 selfloop transitions, 116 changer transitions 0/586 dead transitions. [2023-01-27 20:16:06,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 586 transitions, 14088 flow [2023-01-27 20:16:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:16:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:16:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1897 transitions. [2023-01-27 20:16:06,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33754448398576514 [2023-01-27 20:16:06,145 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1897 transitions. [2023-01-27 20:16:06,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1897 transitions. [2023-01-27 20:16:06,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:06,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1897 transitions. [2023-01-27 20:16:06,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 189.7) internal successors, (1897), 10 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:06,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:06,149 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:06,149 INFO L175 Difference]: Start difference. First operand has 311 places, 573 transitions, 12880 flow. Second operand 10 states and 1897 transitions. [2023-01-27 20:16:06,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 586 transitions, 14088 flow [2023-01-27 20:16:06,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 13896 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-27 20:16:06,562 INFO L231 Difference]: Finished difference. Result has 310 places, 569 transitions, 12806 flow [2023-01-27 20:16:06,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12415, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12806, PETRI_PLACES=310, PETRI_TRANSITIONS=569} [2023-01-27 20:16:06,563 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2023-01-27 20:16:06,563 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 569 transitions, 12806 flow [2023-01-27 20:16:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:06,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:06,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:06,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:06,764 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,SelfDestructingSolverStorable43 [2023-01-27 20:16:06,765 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:06,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1108262019, now seen corresponding path program 28 times [2023-01-27 20:16:06,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:06,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82059888] [2023-01-27 20:16:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:06,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:16:07,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82059888] [2023-01-27 20:16:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82059888] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368890079] [2023-01-27 20:16:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:16:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:07,270 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 20:16:07,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:16:07,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:16:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:07,619 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 112 treesize of output 80 [2023-01-27 20:16:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:07,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:07,919 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 117 treesize of output 69 [2023-01-27 20:16:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368890079] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:07,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:07,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-01-27 20:16:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384894238] [2023-01-27 20:16:07,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 20:16:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 20:16:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:16:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-27 20:16:07,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 569 transitions, 12806 flow. Second operand has 24 states, 24 states have (on average 174.83333333333334) internal successors, (4196), 24 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:07,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:07,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-27 20:16:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:09,367 INFO L130 PetriNetUnfolder]: 1740/3681 cut-off events. [2023-01-27 20:16:09,367 INFO L131 PetriNetUnfolder]: For 64024/64024 co-relation queries the response was YES. [2023-01-27 20:16:09,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 3681 events. 1740/3681 cut-off events. For 64024/64024 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28827 event pairs, 476 based on Foata normal form. 12/3693 useless extension candidates. Maximal degree in co-relation 30173. Up to 2305 conditions per place. [2023-01-27 20:16:09,398 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 423 selfloop transitions, 175 changer transitions 3/601 dead transitions. [2023-01-27 20:16:09,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 601 transitions, 14190 flow [2023-01-27 20:16:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:16:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:16:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2319 transitions. [2023-01-27 20:16:09,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31741034765945797 [2023-01-27 20:16:09,401 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2319 transitions. [2023-01-27 20:16:09,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2319 transitions. [2023-01-27 20:16:09,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:09,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2319 transitions. [2023-01-27 20:16:09,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 178.3846153846154) internal successors, (2319), 13 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:09,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:09,406 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:09,406 INFO L175 Difference]: Start difference. First operand has 310 places, 569 transitions, 12806 flow. Second operand 13 states and 2319 transitions. [2023-01-27 20:16:09,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 601 transitions, 14190 flow [2023-01-27 20:16:09,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 601 transitions, 13788 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-01-27 20:16:09,852 INFO L231 Difference]: Finished difference. Result has 312 places, 563 transitions, 12673 flow [2023-01-27 20:16:09,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12673, PETRI_PLACES=312, PETRI_TRANSITIONS=563} [2023-01-27 20:16:09,853 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-01-27 20:16:09,853 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 563 transitions, 12673 flow [2023-01-27 20:16:09,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 174.83333333333334) internal successors, (4196), 24 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:09,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:09,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:09,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:10,054 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:10,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1110045957, now seen corresponding path program 29 times [2023-01-27 20:16:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942579938] [2023-01-27 20:16:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:10,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942579938] [2023-01-27 20:16:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942579938] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452630801] [2023-01-27 20:16:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:16:10,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:10,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:10,364 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:10,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 20:16:10,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:16:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:16:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:10,718 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 91 treesize of output 59 [2023-01-27 20:16:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:10,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:10,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:10,949 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 117 treesize of output 69 [2023-01-27 20:16:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:10,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452630801] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:10,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:10,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 20:16:11,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101145983] [2023-01-27 20:16:11,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:11,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 20:16:11,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 20:16:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-01-27 20:16:11,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:11,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 563 transitions, 12673 flow. Second operand has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:11,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:11,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:11,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:12,334 INFO L130 PetriNetUnfolder]: 1726/3631 cut-off events. [2023-01-27 20:16:12,335 INFO L131 PetriNetUnfolder]: For 62873/62873 co-relation queries the response was YES. [2023-01-27 20:16:12,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 3631 events. 1726/3631 cut-off events. For 62873/62873 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28132 event pairs, 356 based on Foata normal form. 12/3643 useless extension candidates. Maximal degree in co-relation 29803. Up to 1996 conditions per place. [2023-01-27 20:16:12,366 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 365 selfloop transitions, 238 changer transitions 0/603 dead transitions. [2023-01-27 20:16:12,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 603 transitions, 14026 flow [2023-01-27 20:16:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:16:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:16:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2485 transitions. [2023-01-27 20:16:12,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34013139885026006 [2023-01-27 20:16:12,368 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2485 transitions. [2023-01-27 20:16:12,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2485 transitions. [2023-01-27 20:16:12,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:12,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2485 transitions. [2023-01-27 20:16:12,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.15384615384616) internal successors, (2485), 13 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:12,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:12,373 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:12,373 INFO L175 Difference]: Start difference. First operand has 312 places, 563 transitions, 12673 flow. Second operand 13 states and 2485 transitions. [2023-01-27 20:16:12,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 603 transitions, 14026 flow [2023-01-27 20:16:12,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 603 transitions, 13764 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-01-27 20:16:12,833 INFO L231 Difference]: Finished difference. Result has 309 places, 563 transitions, 12999 flow [2023-01-27 20:16:12,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12349, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12999, PETRI_PLACES=309, PETRI_TRANSITIONS=563} [2023-01-27 20:16:12,833 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-27 20:16:12,833 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 563 transitions, 12999 flow [2023-01-27 20:16:12,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:12,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:12,834 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:12,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:13,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:13,037 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:13,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2082779586, now seen corresponding path program 30 times [2023-01-27 20:16:13,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:13,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038312277] [2023-01-27 20:16:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:13,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:13,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:13,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038312277] [2023-01-27 20:16:13,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038312277] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:13,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770372005] [2023-01-27 20:16:13,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:16:13,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:13,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:13,310 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:13,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 20:16:13,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:16:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:16:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:13,664 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 82 treesize of output 50 [2023-01-27 20:16:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:13,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:13,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:13,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2023-01-27 20:16:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770372005] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:13,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:16:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048946912] [2023-01-27 20:16:13,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:16:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:16:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:16:13,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:13,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 563 transitions, 12999 flow. Second operand has 18 states, 18 states have (on average 187.22222222222223) internal successors, (3370), 18 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:13,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:13,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:13,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:14,903 INFO L130 PetriNetUnfolder]: 1694/3559 cut-off events. [2023-01-27 20:16:14,903 INFO L131 PetriNetUnfolder]: For 64012/64012 co-relation queries the response was YES. [2023-01-27 20:16:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30097 conditions, 3559 events. 1694/3559 cut-off events. For 64012/64012 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27375 event pairs, 434 based on Foata normal form. 8/3567 useless extension candidates. Maximal degree in co-relation 29993. Up to 2492 conditions per place. [2023-01-27 20:16:14,934 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 368 selfloop transitions, 207 changer transitions 10/585 dead transitions. [2023-01-27 20:16:14,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 585 transitions, 14226 flow [2023-01-27 20:16:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:16:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:16:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2092 transitions. [2023-01-27 20:16:14,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33840181171142025 [2023-01-27 20:16:14,936 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2092 transitions. [2023-01-27 20:16:14,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2092 transitions. [2023-01-27 20:16:14,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:14,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2092 transitions. [2023-01-27 20:16:14,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.1818181818182) internal successors, (2092), 11 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:14,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:14,940 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:14,940 INFO L175 Difference]: Start difference. First operand has 309 places, 563 transitions, 12999 flow. Second operand 11 states and 2092 transitions. [2023-01-27 20:16:14,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 585 transitions, 14226 flow [2023-01-27 20:16:15,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 585 transitions, 13933 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-01-27 20:16:15,394 INFO L231 Difference]: Finished difference. Result has 309 places, 556 transitions, 12982 flow [2023-01-27 20:16:15,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12642, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12982, PETRI_PLACES=309, PETRI_TRANSITIONS=556} [2023-01-27 20:16:15,394 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-27 20:16:15,394 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 556 transitions, 12982 flow [2023-01-27 20:16:15,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.22222222222223) internal successors, (3370), 18 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:15,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:15,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:15,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:15,595 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,SelfDestructingSolverStorable46 [2023-01-27 20:16:15,595 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:15,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash 452270500, now seen corresponding path program 31 times [2023-01-27 20:16:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631336997] [2023-01-27 20:16:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:15,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631336997] [2023-01-27 20:16:15,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631336997] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:15,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597749744] [2023-01-27 20:16:15,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:16:15,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:15,904 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:15,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 20:16:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:16:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:16,260 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 112 treesize of output 80 [2023-01-27 20:16:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:16,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:16,533 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 44 treesize of output 28 [2023-01-27 20:16:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:16,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597749744] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:16,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-27 20:16:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538673706] [2023-01-27 20:16:16,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 20:16:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 20:16:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:16:16,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:16,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 556 transitions, 12982 flow. Second operand has 21 states, 21 states have (on average 187.28571428571428) internal successors, (3933), 21 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:16,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:16,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:16,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:17,874 INFO L130 PetriNetUnfolder]: 1654/3463 cut-off events. [2023-01-27 20:16:17,874 INFO L131 PetriNetUnfolder]: For 64625/64625 co-relation queries the response was YES. [2023-01-27 20:16:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29571 conditions, 3463 events. 1654/3463 cut-off events. For 64625/64625 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26384 event pairs, 62 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 29467. Up to 1738 conditions per place. [2023-01-27 20:16:17,904 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 324 selfloop transitions, 253 changer transitions 5/582 dead transitions. [2023-01-27 20:16:17,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 582 transitions, 14247 flow [2023-01-27 20:16:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:16:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:16:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2470 transitions. [2023-01-27 20:16:17,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-27 20:16:17,906 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2470 transitions. [2023-01-27 20:16:17,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2470 transitions. [2023-01-27 20:16:17,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:17,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2470 transitions. [2023-01-27 20:16:17,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:17,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:17,911 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:17,911 INFO L175 Difference]: Start difference. First operand has 309 places, 556 transitions, 12982 flow. Second operand 13 states and 2470 transitions. [2023-01-27 20:16:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 582 transitions, 14247 flow [2023-01-27 20:16:18,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 582 transitions, 13806 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-01-27 20:16:18,356 INFO L231 Difference]: Finished difference. Result has 305 places, 549 transitions, 12897 flow [2023-01-27 20:16:18,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12897, PETRI_PLACES=305, PETRI_TRANSITIONS=549} [2023-01-27 20:16:18,356 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-01-27 20:16:18,356 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 549 transitions, 12897 flow [2023-01-27 20:16:18,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 187.28571428571428) internal successors, (3933), 21 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:18,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:18,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-27 20:16:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-27 20:16:18,557 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:18,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 216370355, now seen corresponding path program 32 times [2023-01-27 20:16:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:18,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302336083] [2023-01-27 20:16:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:18,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302336083] [2023-01-27 20:16:18,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302336083] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:18,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842326190] [2023-01-27 20:16:18,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:16:18,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:18,859 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:18,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 20:16:18,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:16:18,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:16:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:19,221 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 17 treesize of output 9 [2023-01-27 20:16:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:19,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:19,440 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 65 treesize of output 41 [2023-01-27 20:16:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842326190] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:19,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-27 20:16:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590167249] [2023-01-27 20:16:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 20:16:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 20:16:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-01-27 20:16:19,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:16:19,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 549 transitions, 12897 flow. Second operand has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:19,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:19,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:16:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:20,458 INFO L130 PetriNetUnfolder]: 1626/3339 cut-off events. [2023-01-27 20:16:20,458 INFO L131 PetriNetUnfolder]: For 67515/67515 co-relation queries the response was YES. [2023-01-27 20:16:20,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28946 conditions, 3339 events. 1626/3339 cut-off events. For 67515/67515 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24758 event pairs, 623 based on Foata normal form. 32/3371 useless extension candidates. Maximal degree in co-relation 28843. Up to 2977 conditions per place. [2023-01-27 20:16:20,487 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 457 selfloop transitions, 105 changer transitions 2/564 dead transitions. [2023-01-27 20:16:20,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 564 transitions, 14071 flow [2023-01-27 20:16:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:16:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:16:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1712 transitions. [2023-01-27 20:16:20,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33847370502174773 [2023-01-27 20:16:20,488 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1712 transitions. [2023-01-27 20:16:20,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1712 transitions. [2023-01-27 20:16:20,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:20,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1712 transitions. [2023-01-27 20:16:20,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 190.22222222222223) internal successors, (1712), 9 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:20,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:20,492 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:20,492 INFO L175 Difference]: Start difference. First operand has 305 places, 549 transitions, 12897 flow. Second operand 9 states and 1712 transitions. [2023-01-27 20:16:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 564 transitions, 14071 flow [2023-01-27 20:16:20,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 564 transitions, 13541 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-01-27 20:16:20,887 INFO L231 Difference]: Finished difference. Result has 293 places, 543 transitions, 12486 flow [2023-01-27 20:16:20,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12486, PETRI_PLACES=293, PETRI_TRANSITIONS=543} [2023-01-27 20:16:20,888 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-01-27 20:16:20,888 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 543 transitions, 12486 flow [2023-01-27 20:16:20,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:20,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:20,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:20,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:21,089 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,SelfDestructingSolverStorable48 [2023-01-27 20:16:21,089 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:21,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1781878825, now seen corresponding path program 33 times [2023-01-27 20:16:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670518149] [2023-01-27 20:16:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:21,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:21,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670518149] [2023-01-27 20:16:21,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670518149] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:21,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968829912] [2023-01-27 20:16:21,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:16:21,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:21,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:21,472 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:21,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 20:16:21,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:16:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 20:16:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:16:21,748 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 52 treesize of output 48 [2023-01-27 20:16:21,852 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 17 treesize of output 9 [2023-01-27 20:16:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:21,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:22,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:22,080 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 74 treesize of output 58 [2023-01-27 20:16:22,082 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 43 treesize of output 41 [2023-01-27 20:16:22,086 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 41 treesize of output 39 [2023-01-27 20:16:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968829912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:22,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:22,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 20:16:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203250630] [2023-01-27 20:16:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:22,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 20:16:22,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 20:16:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2023-01-27 20:16:22,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-27 20:16:22,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 543 transitions, 12486 flow. Second operand has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:22,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:22,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-27 20:16:22,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:23,391 INFO L130 PetriNetUnfolder]: 1655/3366 cut-off events. [2023-01-27 20:16:23,391 INFO L131 PetriNetUnfolder]: For 64154/64154 co-relation queries the response was YES. [2023-01-27 20:16:23,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29115 conditions, 3366 events. 1655/3366 cut-off events. For 64154/64154 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24718 event pairs, 148 based on Foata normal form. 36/3402 useless extension candidates. Maximal degree in co-relation 29014. Up to 1308 conditions per place. [2023-01-27 20:16:23,420 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 234 selfloop transitions, 374 changer transitions 2/610 dead transitions. [2023-01-27 20:16:23,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 610 transitions, 14697 flow [2023-01-27 20:16:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:16:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:16:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2610 transitions. [2023-01-27 20:16:23,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33172343670564314 [2023-01-27 20:16:23,422 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2610 transitions. [2023-01-27 20:16:23,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2610 transitions. [2023-01-27 20:16:23,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:23,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2610 transitions. [2023-01-27 20:16:23,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.42857142857142) internal successors, (2610), 14 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:23,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:23,428 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:23,428 INFO L175 Difference]: Start difference. First operand has 293 places, 543 transitions, 12486 flow. Second operand 14 states and 2610 transitions. [2023-01-27 20:16:23,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 610 transitions, 14697 flow [2023-01-27 20:16:23,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 610 transitions, 14488 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 20:16:23,886 INFO L231 Difference]: Finished difference. Result has 301 places, 564 transitions, 13716 flow [2023-01-27 20:16:23,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12293, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13716, PETRI_PLACES=301, PETRI_TRANSITIONS=564} [2023-01-27 20:16:23,887 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-01-27 20:16:23,887 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 564 transitions, 13716 flow [2023-01-27 20:16:23,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:23,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:23,887 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:23,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-27 20:16:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 20:16:24,089 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:24,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1235969341, now seen corresponding path program 34 times [2023-01-27 20:16:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:24,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302807073] [2023-01-27 20:16:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302807073] [2023-01-27 20:16:24,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302807073] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713625544] [2023-01-27 20:16:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:16:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:24,437 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:24,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 20:16:24,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:16:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:16:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:24,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:16:24,740 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 65 treesize of output 61 [2023-01-27 20:16:24,939 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 133 treesize of output 93 [2023-01-27 20:16:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:25,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:25,299 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 74 treesize of output 58 [2023-01-27 20:16:25,302 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 43 treesize of output 41 [2023-01-27 20:16:25,304 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 41 treesize of output 39 [2023-01-27 20:16:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713625544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:25,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-27 20:16:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826010307] [2023-01-27 20:16:25,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:16:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:16:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2023-01-27 20:16:25,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-27 20:16:25,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 564 transitions, 13716 flow. Second operand has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:25,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:25,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-27 20:16:25,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:27,062 INFO L130 PetriNetUnfolder]: 1686/3405 cut-off events. [2023-01-27 20:16:27,062 INFO L131 PetriNetUnfolder]: For 71604/71604 co-relation queries the response was YES. [2023-01-27 20:16:27,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 3405 events. 1686/3405 cut-off events. For 71604/71604 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24921 event pairs, 158 based on Foata normal form. 12/3417 useless extension candidates. Maximal degree in co-relation 30565. Up to 1814 conditions per place. [2023-01-27 20:16:27,088 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 293 selfloop transitions, 347 changer transitions 1/641 dead transitions. [2023-01-27 20:16:27,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 641 transitions, 15905 flow [2023-01-27 20:16:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:16:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:16:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3179 transitions. [2023-01-27 20:16:27,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33274021352313166 [2023-01-27 20:16:27,091 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3179 transitions. [2023-01-27 20:16:27,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3179 transitions. [2023-01-27 20:16:27,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:27,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3179 transitions. [2023-01-27 20:16:27,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:27,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:27,097 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:27,097 INFO L175 Difference]: Start difference. First operand has 301 places, 564 transitions, 13716 flow. Second operand 17 states and 3179 transitions. [2023-01-27 20:16:27,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 641 transitions, 15905 flow [2023-01-27 20:16:27,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 641 transitions, 15309 flow, removed 61 selfloop flow, removed 8 redundant places. [2023-01-27 20:16:27,538 INFO L231 Difference]: Finished difference. Result has 312 places, 576 transitions, 14264 flow [2023-01-27 20:16:27,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13129, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14264, PETRI_PLACES=312, PETRI_TRANSITIONS=576} [2023-01-27 20:16:27,538 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-01-27 20:16:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 576 transitions, 14264 flow [2023-01-27 20:16:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:27,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:27,539 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:27,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:27,740 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:27,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -935413069, now seen corresponding path program 35 times [2023-01-27 20:16:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:27,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849615755] [2023-01-27 20:16:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849615755] [2023-01-27 20:16:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849615755] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816976745] [2023-01-27 20:16:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:16:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:28,160 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:28,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 20:16:28,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:16:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 20:16:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:16:28,448 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 65 treesize of output 61 [2023-01-27 20:16:28,643 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 133 treesize of output 93 [2023-01-27 20:16:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:28,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:28,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:28,916 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 74 treesize of output 58 [2023-01-27 20:16:28,930 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 43 treesize of output 41 [2023-01-27 20:16:28,932 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 41 treesize of output 39 [2023-01-27 20:16:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:28,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816976745] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:28,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:28,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-27 20:16:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275630581] [2023-01-27 20:16:28,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:28,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 20:16:28,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 20:16:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=494, Unknown=4, NotChecked=0, Total=600 [2023-01-27 20:16:28,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-27 20:16:28,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 576 transitions, 14264 flow. Second operand has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:28,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:28,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-27 20:16:28,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:30,313 INFO L130 PetriNetUnfolder]: 1668/3343 cut-off events. [2023-01-27 20:16:30,313 INFO L131 PetriNetUnfolder]: For 72659/72659 co-relation queries the response was YES. [2023-01-27 20:16:30,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30366 conditions, 3343 events. 1668/3343 cut-off events. For 72659/72659 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24273 event pairs, 136 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 30262. Up to 1814 conditions per place. [2023-01-27 20:16:30,341 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 272 selfloop transitions, 339 changer transitions 2/613 dead transitions. [2023-01-27 20:16:30,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 613 transitions, 15667 flow [2023-01-27 20:16:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:16:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:16:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2615 transitions. [2023-01-27 20:16:30,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323589222165735 [2023-01-27 20:16:30,343 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2615 transitions. [2023-01-27 20:16:30,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2615 transitions. [2023-01-27 20:16:30,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:30,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2615 transitions. [2023-01-27 20:16:30,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.78571428571428) internal successors, (2615), 14 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,349 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,349 INFO L175 Difference]: Start difference. First operand has 312 places, 576 transitions, 14264 flow. Second operand 14 states and 2615 transitions. [2023-01-27 20:16:30,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 613 transitions, 15667 flow [2023-01-27 20:16:30,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 613 transitions, 15307 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-01-27 20:16:30,815 INFO L231 Difference]: Finished difference. Result has 311 places, 568 transitions, 14433 flow [2023-01-27 20:16:30,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13773, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14433, PETRI_PLACES=311, PETRI_TRANSITIONS=568} [2023-01-27 20:16:30,815 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-01-27 20:16:30,815 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 568 transitions, 14433 flow [2023-01-27 20:16:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:30,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:31,020 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,SelfDestructingSolverStorable51 [2023-01-27 20:16:31,020 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:31,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814978, now seen corresponding path program 36 times [2023-01-27 20:16:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:31,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860651137] [2023-01-27 20:16:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:31,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:31,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860651137] [2023-01-27 20:16:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860651137] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:31,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854960376] [2023-01-27 20:16:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:16:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:31,387 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:31,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 20:16:31,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:16:31,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 20:16:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:16:31,692 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 52 treesize of output 48 [2023-01-27 20:16:31,896 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 82 treesize of output 50 [2023-01-27 20:16:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:31,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:32,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:32,179 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 107 treesize of output 75 [2023-01-27 20:16:32,182 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 19 treesize of output 15 [2023-01-27 20:16:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854960376] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:32,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 20:16:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761777724] [2023-01-27 20:16:32,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:32,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:16:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:16:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2023-01-27 20:16:32,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-27 20:16:32,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 568 transitions, 14433 flow. Second operand has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:32,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:32,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-27 20:16:32,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:33,640 INFO L130 PetriNetUnfolder]: 1634/3265 cut-off events. [2023-01-27 20:16:33,640 INFO L131 PetriNetUnfolder]: For 78614/78614 co-relation queries the response was YES. [2023-01-27 20:16:33,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 3265 events. 1634/3265 cut-off events. For 78614/78614 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23440 event pairs, 187 based on Foata normal form. 8/3273 useless extension candidates. Maximal degree in co-relation 30090. Up to 1064 conditions per place. [2023-01-27 20:16:33,666 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 258 selfloop transitions, 339 changer transitions 11/608 dead transitions. [2023-01-27 20:16:33,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 608 transitions, 15993 flow [2023-01-27 20:16:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:16:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:16:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3517 transitions. [2023-01-27 20:16:33,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32936879565461696 [2023-01-27 20:16:33,668 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3517 transitions. [2023-01-27 20:16:33,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3517 transitions. [2023-01-27 20:16:33,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:33,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3517 transitions. [2023-01-27 20:16:33,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.10526315789474) internal successors, (3517), 19 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:33,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:33,675 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:33,675 INFO L175 Difference]: Start difference. First operand has 311 places, 568 transitions, 14433 flow. Second operand 19 states and 3517 transitions. [2023-01-27 20:16:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 608 transitions, 15993 flow [2023-01-27 20:16:34,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 608 transitions, 15316 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-01-27 20:16:34,055 INFO L231 Difference]: Finished difference. Result has 314 places, 571 transitions, 14482 flow [2023-01-27 20:16:34,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13698, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14482, PETRI_PLACES=314, PETRI_TRANSITIONS=571} [2023-01-27 20:16:34,056 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-01-27 20:16:34,056 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 571 transitions, 14482 flow [2023-01-27 20:16:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:34,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:34,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:34,257 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,SelfDestructingSolverStorable52 [2023-01-27 20:16:34,257 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:34,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash -479361748, now seen corresponding path program 37 times [2023-01-27 20:16:34,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:34,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323462851] [2023-01-27 20:16:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:34,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 20:16:34,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323462851] [2023-01-27 20:16:34,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323462851] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:16:34,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:16:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:16:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650920744] [2023-01-27 20:16:34,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:16:34,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:16:34,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:16:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:16:34,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-27 20:16:34,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 571 transitions, 14482 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:34,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-27 20:16:34,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:34,662 INFO L130 PetriNetUnfolder]: 819/1624 cut-off events. [2023-01-27 20:16:34,662 INFO L131 PetriNetUnfolder]: For 39054/39054 co-relation queries the response was YES. [2023-01-27 20:16:34,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15255 conditions, 1624 events. 819/1624 cut-off events. For 39054/39054 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9899 event pairs, 350 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 15158. Up to 1621 conditions per place. [2023-01-27 20:16:34,673 INFO L137 encePairwiseOnDemand]: 560/562 looper letters, 348 selfloop transitions, 4 changer transitions 0/352 dead transitions. [2023-01-27 20:16:34,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 9011 flow [2023-01-27 20:16:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:16:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:16:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1400 transitions. [2023-01-27 20:16:34,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151838671411625 [2023-01-27 20:16:34,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1400 transitions. [2023-01-27 20:16:34,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1400 transitions. [2023-01-27 20:16:34,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:34,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1400 transitions. [2023-01-27 20:16:34,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,677 INFO L175 Difference]: Start difference. First operand has 314 places, 571 transitions, 14482 flow. Second operand 6 states and 1400 transitions. [2023-01-27 20:16:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 9011 flow [2023-01-27 20:16:34,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 352 transitions, 7835 flow, removed 15 selfloop flow, removed 34 redundant places. [2023-01-27 20:16:34,803 INFO L231 Difference]: Finished difference. Result has 261 places, 352 transitions, 7139 flow [2023-01-27 20:16:34,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7139, PETRI_PLACES=261, PETRI_TRANSITIONS=352} [2023-01-27 20:16:34,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-01-27 20:16:34,803 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 352 transitions, 7139 flow [2023-01-27 20:16:34,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:34,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:34,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:34,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-01-27 20:16:34,804 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:34,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -678092971, now seen corresponding path program 38 times [2023-01-27 20:16:34,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:34,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265273656] [2023-01-27 20:16:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:16:35,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:35,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265273656] [2023-01-27 20:16:35,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265273656] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:35,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539008115] [2023-01-27 20:16:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:16:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:35,609 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:35,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 20:16:35,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:16:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:16:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:36,135 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 158 treesize of output 86 [2023-01-27 20:16:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:37,454 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 20:16:37,454 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 242 treesize of output 141 [2023-01-27 20:16:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:37,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539008115] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:37,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:37,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:16:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478630774] [2023-01-27 20:16:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:16:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:16:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:16:37,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:16:37,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 352 transitions, 7139 flow. Second operand has 32 states, 32 states have (on average 161.71875) internal successors, (5175), 32 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:37,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:37,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:16:37,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:43,353 INFO L130 PetriNetUnfolder]: 1391/2887 cut-off events. [2023-01-27 20:16:43,353 INFO L131 PetriNetUnfolder]: For 54196/54196 co-relation queries the response was YES. [2023-01-27 20:16:43,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 2887 events. 1391/2887 cut-off events. For 54196/54196 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20997 event pairs, 52 based on Foata normal form. 26/2913 useless extension candidates. Maximal degree in co-relation 23717. Up to 739 conditions per place. [2023-01-27 20:16:43,373 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 233 selfloop transitions, 362 changer transitions 64/659 dead transitions. [2023-01-27 20:16:43,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 659 transitions, 13609 flow [2023-01-27 20:16:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 20:16:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 20:16:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6903 transitions. [2023-01-27 20:16:43,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29245043213014743 [2023-01-27 20:16:43,377 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6903 transitions. [2023-01-27 20:16:43,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6903 transitions. [2023-01-27 20:16:43,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:43,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6903 transitions. [2023-01-27 20:16:43,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 164.35714285714286) internal successors, (6903), 42 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:43,391 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:43,391 INFO L175 Difference]: Start difference. First operand has 261 places, 352 transitions, 7139 flow. Second operand 42 states and 6903 transitions. [2023-01-27 20:16:43,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 659 transitions, 13609 flow [2023-01-27 20:16:43,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 659 transitions, 13602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:16:43,697 INFO L231 Difference]: Finished difference. Result has 307 places, 480 transitions, 10528 flow [2023-01-27 20:16:43,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10528, PETRI_PLACES=307, PETRI_TRANSITIONS=480} [2023-01-27 20:16:43,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-01-27 20:16:43,697 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 480 transitions, 10528 flow [2023-01-27 20:16:43,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.71875) internal successors, (5175), 32 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:43,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:43,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:43,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:43,898 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,SelfDestructingSolverStorable54 [2023-01-27 20:16:43,898 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:43,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1882165963, now seen corresponding path program 39 times [2023-01-27 20:16:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:43,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182142584] [2023-01-27 20:16:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:43,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:44,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182142584] [2023-01-27 20:16:44,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182142584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:44,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913846334] [2023-01-27 20:16:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:16:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:44,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:44,765 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 20:16:44,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:16:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 20:16:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:45,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:45,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-27 20:16:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:45,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:47,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:47,956 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 175 [2023-01-27 20:16:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913846334] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:48,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:48,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-27 20:16:48,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632775101] [2023-01-27 20:16:48,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:16:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:16:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-01-27 20:16:48,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:16:48,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 480 transitions, 10528 flow. Second operand has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:48,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:48,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:16:48,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:51,767 INFO L130 PetriNetUnfolder]: 1660/3203 cut-off events. [2023-01-27 20:16:51,768 INFO L131 PetriNetUnfolder]: For 68685/68685 co-relation queries the response was YES. [2023-01-27 20:16:51,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 3203 events. 1660/3203 cut-off events. For 68685/68685 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22163 event pairs, 176 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 28536. Up to 853 conditions per place. [2023-01-27 20:16:51,794 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 336 selfloop transitions, 348 changer transitions 20/704 dead transitions. [2023-01-27 20:16:51,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 704 transitions, 15880 flow [2023-01-27 20:16:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:16:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:16:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3995 transitions. [2023-01-27 20:16:51,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32311549660304106 [2023-01-27 20:16:51,797 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3995 transitions. [2023-01-27 20:16:51,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3995 transitions. [2023-01-27 20:16:51,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:51,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3995 transitions. [2023-01-27 20:16:51,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.5909090909091) internal successors, (3995), 22 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:51,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:51,804 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:51,804 INFO L175 Difference]: Start difference. First operand has 307 places, 480 transitions, 10528 flow. Second operand 22 states and 3995 transitions. [2023-01-27 20:16:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 704 transitions, 15880 flow [2023-01-27 20:16:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 704 transitions, 14515 flow, removed 408 selfloop flow, removed 18 redundant places. [2023-01-27 20:16:52,143 INFO L231 Difference]: Finished difference. Result has 314 places, 591 transitions, 12655 flow [2023-01-27 20:16:52,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12655, PETRI_PLACES=314, PETRI_TRANSITIONS=591} [2023-01-27 20:16:52,143 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-01-27 20:16:52,143 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 591 transitions, 12655 flow [2023-01-27 20:16:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:52,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:52,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:52,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:52,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:52,349 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:52,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1575334059, now seen corresponding path program 40 times [2023-01-27 20:16:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:52,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583436893] [2023-01-27 20:16:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:52,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:52,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583436893] [2023-01-27 20:16:52,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583436893] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:52,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976560143] [2023-01-27 20:16:52,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:16:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:52,972 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:16:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 20:16:53,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:16:53,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 20:16:53,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:54,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:54,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 99 [2023-01-27 20:16:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:54,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:55,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:55,713 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 143 [2023-01-27 20:16:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976560143] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:55,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:16:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691489453] [2023-01-27 20:16:55,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:55,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:16:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:16:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:16:55,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:16:55,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 591 transitions, 12655 flow. Second operand has 27 states, 27 states have (on average 177.77777777777777) internal successors, (4800), 27 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:55,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:55,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:16:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:59,154 INFO L130 PetriNetUnfolder]: 1922/3702 cut-off events. [2023-01-27 20:16:59,155 INFO L131 PetriNetUnfolder]: For 80031/80031 co-relation queries the response was YES. [2023-01-27 20:16:59,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32012 conditions, 3702 events. 1922/3702 cut-off events. For 80031/80031 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26124 event pairs, 384 based on Foata normal form. 16/3718 useless extension candidates. Maximal degree in co-relation 31913. Up to 2091 conditions per place. [2023-01-27 20:16:59,180 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 472 selfloop transitions, 261 changer transitions 31/764 dead transitions. [2023-01-27 20:16:59,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 764 transitions, 16777 flow [2023-01-27 20:16:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 20:16:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 20:16:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5611 transitions. [2023-01-27 20:16:59,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220640569395018 [2023-01-27 20:16:59,183 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5611 transitions. [2023-01-27 20:16:59,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5611 transitions. [2023-01-27 20:16:59,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:59,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5611 transitions. [2023-01-27 20:16:59,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,193 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,193 INFO L175 Difference]: Start difference. First operand has 314 places, 591 transitions, 12655 flow. Second operand 31 states and 5611 transitions. [2023-01-27 20:16:59,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 764 transitions, 16777 flow [2023-01-27 20:16:59,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 764 transitions, 16540 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-01-27 20:16:59,599 INFO L231 Difference]: Finished difference. Result has 344 places, 644 transitions, 14350 flow [2023-01-27 20:16:59,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12434, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14350, PETRI_PLACES=344, PETRI_TRANSITIONS=644} [2023-01-27 20:16:59,599 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2023-01-27 20:16:59,599 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 644 transitions, 14350 flow [2023-01-27 20:16:59,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.77777777777777) internal successors, (4800), 27 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:59,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-27 20:16:59,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:59,801 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:16:59,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1317900205, now seen corresponding path program 41 times [2023-01-27 20:16:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111350701] [2023-01-27 20:16:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:00,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111350701] [2023-01-27 20:17:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111350701] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183526732] [2023-01-27 20:17:00,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:17:00,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:00,384 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) [2023-01-27 20:17:00,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 20:17:00,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:17:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 20:17:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:00,872 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 173 treesize of output 113 [2023-01-27 20:17:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:01,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:02,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:02,459 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 313 treesize of output 191 [2023-01-27 20:17:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183526732] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:02,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:17:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855557083] [2023-01-27 20:17:02,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:17:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:17:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:17:02,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:17:02,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 644 transitions, 14350 flow. Second operand has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:02,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:02,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:17:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:08,452 INFO L130 PetriNetUnfolder]: 2148/4255 cut-off events. [2023-01-27 20:17:08,452 INFO L131 PetriNetUnfolder]: For 97863/97863 co-relation queries the response was YES. [2023-01-27 20:17:08,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4255 events. 2148/4255 cut-off events. For 97863/97863 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31657 event pairs, 106 based on Foata normal form. 15/4270 useless extension candidates. Maximal degree in co-relation 37715. Up to 1142 conditions per place. [2023-01-27 20:17:08,487 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 499 selfloop transitions, 426 changer transitions 35/960 dead transitions. [2023-01-27 20:17:08,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 960 transitions, 21428 flow [2023-01-27 20:17:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 20:17:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 20:17:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6550 transitions. [2023-01-27 20:17:08,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237445630684065 [2023-01-27 20:17:08,493 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6550 transitions. [2023-01-27 20:17:08,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6550 transitions. [2023-01-27 20:17:08,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:08,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6550 transitions. [2023-01-27 20:17:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 181.94444444444446) internal successors, (6550), 36 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:08,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:08,505 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:08,505 INFO L175 Difference]: Start difference. First operand has 344 places, 644 transitions, 14350 flow. Second operand 36 states and 6550 transitions. [2023-01-27 20:17:08,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 960 transitions, 21428 flow [2023-01-27 20:17:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 960 transitions, 20921 flow, removed 154 selfloop flow, removed 17 redundant places. [2023-01-27 20:17:09,175 INFO L231 Difference]: Finished difference. Result has 373 places, 732 transitions, 17052 flow [2023-01-27 20:17:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13983, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17052, PETRI_PLACES=373, PETRI_TRANSITIONS=732} [2023-01-27 20:17:09,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-01-27 20:17:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 732 transitions, 17052 flow [2023-01-27 20:17:09,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:09,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:09,379 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,SelfDestructingSolverStorable57 [2023-01-27 20:17:09,379 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:09,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash -256187255, now seen corresponding path program 42 times [2023-01-27 20:17:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927565122] [2023-01-27 20:17:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:10,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:10,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927565122] [2023-01-27 20:17:10,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927565122] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:10,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386105820] [2023-01-27 20:17:10,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:17:10,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:10,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:10,166 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) [2023-01-27 20:17:10,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 20:17:10,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:17:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:17:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:10,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:10,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 99 [2023-01-27 20:17:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:12,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:12,822 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 154 [2023-01-27 20:17:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386105820] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:13,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:13,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-27 20:17:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726278639] [2023-01-27 20:17:13,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:13,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:17:13,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:17:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-01-27 20:17:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:17:13,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 732 transitions, 17052 flow. Second operand has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:13,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:13,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:17:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:17,435 INFO L130 PetriNetUnfolder]: 2132/4198 cut-off events. [2023-01-27 20:17:17,436 INFO L131 PetriNetUnfolder]: For 105703/105703 co-relation queries the response was YES. [2023-01-27 20:17:17,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39218 conditions, 4198 events. 2132/4198 cut-off events. For 105703/105703 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30945 event pairs, 569 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 39100. Up to 3041 conditions per place. [2023-01-27 20:17:17,468 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 518 selfloop transitions, 268 changer transitions 19/805 dead transitions. [2023-01-27 20:17:17,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 805 transitions, 19399 flow [2023-01-27 20:17:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:17:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:17:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5052 transitions. [2023-01-27 20:17:17,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210472801220132 [2023-01-27 20:17:17,472 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5052 transitions. [2023-01-27 20:17:17,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5052 transitions. [2023-01-27 20:17:17,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:17,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5052 transitions. [2023-01-27 20:17:17,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 180.42857142857142) internal successors, (5052), 28 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:17,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:17,481 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:17,481 INFO L175 Difference]: Start difference. First operand has 373 places, 732 transitions, 17052 flow. Second operand 28 states and 5052 transitions. [2023-01-27 20:17:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 805 transitions, 19399 flow [2023-01-27 20:17:18,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 805 transitions, 18560 flow, removed 126 selfloop flow, removed 19 redundant places. [2023-01-27 20:17:18,191 INFO L231 Difference]: Finished difference. Result has 383 places, 746 transitions, 17151 flow [2023-01-27 20:17:18,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16124, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17151, PETRI_PLACES=383, PETRI_TRANSITIONS=746} [2023-01-27 20:17:18,191 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 362 predicate places. [2023-01-27 20:17:18,191 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 746 transitions, 17151 flow [2023-01-27 20:17:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:18,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:18,192 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:18,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-27 20:17:18,397 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:18,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1775779559, now seen corresponding path program 43 times [2023-01-27 20:17:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466458889] [2023-01-27 20:17:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466458889] [2023-01-27 20:17:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466458889] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698692397] [2023-01-27 20:17:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:17:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:19,011 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) [2023-01-27 20:17:19,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 20:17:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 20:17:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:19,405 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 228 treesize of output 126 [2023-01-27 20:17:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:21,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:21,143 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 338 treesize of output 218 [2023-01-27 20:17:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:21,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698692397] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:21,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:21,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:17:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527568388] [2023-01-27 20:17:21,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:17:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:17:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:17:21,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:17:21,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 746 transitions, 17151 flow. Second operand has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:21,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:21,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:17:21,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:26,868 INFO L130 PetriNetUnfolder]: 2974/6191 cut-off events. [2023-01-27 20:17:26,868 INFO L131 PetriNetUnfolder]: For 150937/150937 co-relation queries the response was YES. [2023-01-27 20:17:26,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54568 conditions, 6191 events. 2974/6191 cut-off events. For 150937/150937 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 52105 event pairs, 302 based on Foata normal form. 53/6244 useless extension candidates. Maximal degree in co-relation 54451. Up to 1948 conditions per place. [2023-01-27 20:17:26,924 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 598 selfloop transitions, 643 changer transitions 62/1303 dead transitions. [2023-01-27 20:17:26,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1303 transitions, 30822 flow [2023-01-27 20:17:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-27 20:17:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-27 20:17:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7097 transitions. [2023-01-27 20:17:26,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323797791769322 [2023-01-27 20:17:26,928 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7097 transitions. [2023-01-27 20:17:26,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7097 transitions. [2023-01-27 20:17:26,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:26,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7097 transitions. [2023-01-27 20:17:26,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 181.97435897435898) internal successors, (7097), 39 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,941 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:26,941 INFO L175 Difference]: Start difference. First operand has 383 places, 746 transitions, 17151 flow. Second operand 39 states and 7097 transitions. [2023-01-27 20:17:26,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1303 transitions, 30822 flow [2023-01-27 20:17:28,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1303 transitions, 30230 flow, removed 136 selfloop flow, removed 17 redundant places. [2023-01-27 20:17:28,366 INFO L231 Difference]: Finished difference. Result has 416 places, 1009 transitions, 24103 flow [2023-01-27 20:17:28,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16666, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24103, PETRI_PLACES=416, PETRI_TRANSITIONS=1009} [2023-01-27 20:17:28,366 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-01-27 20:17:28,366 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1009 transitions, 24103 flow [2023-01-27 20:17:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:28,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:28,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:28,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:28,567 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,SelfDestructingSolverStorable59 [2023-01-27 20:17:28,568 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:28,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash 600903337, now seen corresponding path program 44 times [2023-01-27 20:17:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:28,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103673623] [2023-01-27 20:17:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103673623] [2023-01-27 20:17:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103673623] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427803684] [2023-01-27 20:17:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:17:29,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:29,299 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) [2023-01-27 20:17:29,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 20:17:29,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:17:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:17:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:30,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:30,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 128 [2023-01-27 20:17:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:30,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:32,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:32,891 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 170 [2023-01-27 20:17:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:33,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427803684] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:33,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:33,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-27 20:17:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405950891] [2023-01-27 20:17:33,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:17:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:17:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:17:33,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:17:33,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1009 transitions, 24103 flow. Second operand has 26 states, 26 states have (on average 177.73076923076923) internal successors, (4621), 26 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:33,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:33,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:17:33,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:44,615 INFO L130 PetriNetUnfolder]: 3082/6399 cut-off events. [2023-01-27 20:17:44,615 INFO L131 PetriNetUnfolder]: For 174021/174021 co-relation queries the response was YES. [2023-01-27 20:17:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 6399 events. 3082/6399 cut-off events. For 174021/174021 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 53952 event pairs, 697 based on Foata normal form. 13/6412 useless extension candidates. Maximal degree in co-relation 60374. Up to 3639 conditions per place. [2023-01-27 20:17:44,679 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 766 selfloop transitions, 417 changer transitions 25/1208 dead transitions. [2023-01-27 20:17:44,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1208 transitions, 29630 flow [2023-01-27 20:17:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 20:17:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 20:17:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6713 transitions. [2023-01-27 20:17:44,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3228335096662499 [2023-01-27 20:17:44,683 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6713 transitions. [2023-01-27 20:17:44,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6713 transitions. [2023-01-27 20:17:44,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:44,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6713 transitions. [2023-01-27 20:17:44,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 181.43243243243242) internal successors, (6713), 37 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:44,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:44,695 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:44,695 INFO L175 Difference]: Start difference. First operand has 416 places, 1009 transitions, 24103 flow. Second operand 37 states and 6713 transitions. [2023-01-27 20:17:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1208 transitions, 29630 flow [2023-01-27 20:17:46,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1208 transitions, 28572 flow, removed 504 selfloop flow, removed 10 redundant places. [2023-01-27 20:17:46,553 INFO L231 Difference]: Finished difference. Result has 450 places, 1074 transitions, 25984 flow [2023-01-27 20:17:46,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=23228, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25984, PETRI_PLACES=450, PETRI_TRANSITIONS=1074} [2023-01-27 20:17:46,554 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 429 predicate places. [2023-01-27 20:17:46,555 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1074 transitions, 25984 flow [2023-01-27 20:17:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.73076923076923) internal successors, (4621), 26 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:46,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:46,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:46,756 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:46,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -300215526, now seen corresponding path program 45 times [2023-01-27 20:17:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911548897] [2023-01-27 20:17:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 20:17:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:47,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911548897] [2023-01-27 20:17:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911548897] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:47,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303415330] [2023-01-27 20:17:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:17:47,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:47,062 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) [2023-01-27 20:17:47,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 20:17:47,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 20:17:47,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:17:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:47,475 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 17 treesize of output 9 [2023-01-27 20:17:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 20:17:47,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:47,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:47,679 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 65 treesize of output 41 [2023-01-27 20:17:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 20:17:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303415330] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:47,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:47,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 20:17:47,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187198693] [2023-01-27 20:17:47,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:47,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 20:17:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 20:17:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:17:47,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-27 20:17:47,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1074 transitions, 25984 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:47,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:47,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-27 20:17:47,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:17:50,048 INFO L130 PetriNetUnfolder]: 3091/6363 cut-off events. [2023-01-27 20:17:50,048 INFO L131 PetriNetUnfolder]: For 173147/173147 co-relation queries the response was YES. [2023-01-27 20:17:50,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60412 conditions, 6363 events. 3091/6363 cut-off events. For 173147/173147 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53158 event pairs, 1322 based on Foata normal form. 8/6371 useless extension candidates. Maximal degree in co-relation 60269. Up to 6192 conditions per place. [2023-01-27 20:17:50,115 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 1054 selfloop transitions, 43 changer transitions 0/1097 dead transitions. [2023-01-27 20:17:50,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1097 transitions, 28461 flow [2023-01-27 20:17:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:17:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:17:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1523 transitions. [2023-01-27 20:17:50,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387455516014235 [2023-01-27 20:17:50,117 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1523 transitions. [2023-01-27 20:17:50,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1523 transitions. [2023-01-27 20:17:50,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:17:50,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1523 transitions. [2023-01-27 20:17:50,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.375) internal successors, (1523), 8 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:50,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:50,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:50,120 INFO L175 Difference]: Start difference. First operand has 450 places, 1074 transitions, 25984 flow. Second operand 8 states and 1523 transitions. [2023-01-27 20:17:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1097 transitions, 28461 flow [2023-01-27 20:17:52,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1097 transitions, 27989 flow, removed 157 selfloop flow, removed 19 redundant places. [2023-01-27 20:17:52,204 INFO L231 Difference]: Finished difference. Result has 436 places, 1076 transitions, 25649 flow [2023-01-27 20:17:52,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25512, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25649, PETRI_PLACES=436, PETRI_TRANSITIONS=1076} [2023-01-27 20:17:52,206 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-01-27 20:17:52,206 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1076 transitions, 25649 flow [2023-01-27 20:17:52,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:52,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:52,206 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:52,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 20:17:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:52,412 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:17:52,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2051486215, now seen corresponding path program 46 times [2023-01-27 20:17:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223747175] [2023-01-27 20:17:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:53,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:53,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223747175] [2023-01-27 20:17:53,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223747175] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:53,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74399248] [2023-01-27 20:17:53,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:17:53,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:53,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:53,112 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) [2023-01-27 20:17:53,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 20:17:53,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:17:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:17:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 20:17:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:53,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:53,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 133 [2023-01-27 20:17:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:54,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:56,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:56,489 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 361 treesize of output 212 [2023-01-27 20:17:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74399248] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:17:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308521338] [2023-01-27 20:17:56,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:56,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:17:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:17:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:17:56,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:17:56,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1076 transitions, 25649 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:56,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:56,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:17:56,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:04,841 INFO L130 PetriNetUnfolder]: 3448/7011 cut-off events. [2023-01-27 20:18:04,842 INFO L131 PetriNetUnfolder]: For 190618/190618 co-relation queries the response was YES. [2023-01-27 20:18:04,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65742 conditions, 7011 events. 3448/7011 cut-off events. For 190618/190618 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58880 event pairs, 758 based on Foata normal form. 9/7020 useless extension candidates. Maximal degree in co-relation 65601. Up to 3850 conditions per place. [2023-01-27 20:18:04,913 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 888 selfloop transitions, 449 changer transitions 21/1358 dead transitions. [2023-01-27 20:18:04,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1358 transitions, 33327 flow [2023-01-27 20:18:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 20:18:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 20:18:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6711 transitions. [2023-01-27 20:18:04,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227373280754064 [2023-01-27 20:18:04,917 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6711 transitions. [2023-01-27 20:18:04,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6711 transitions. [2023-01-27 20:18:04,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:04,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6711 transitions. [2023-01-27 20:18:04,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 181.3783783783784) internal successors, (6711), 37 states have internal predecessors, (6711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:04,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:04,929 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:04,929 INFO L175 Difference]: Start difference. First operand has 436 places, 1076 transitions, 25649 flow. Second operand 37 states and 6711 transitions. [2023-01-27 20:18:04,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1358 transitions, 33327 flow [2023-01-27 20:18:07,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1358 transitions, 33244 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 20:18:07,027 INFO L231 Difference]: Finished difference. Result has 476 places, 1197 transitions, 29697 flow [2023-01-27 20:18:07,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25568, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=29697, PETRI_PLACES=476, PETRI_TRANSITIONS=1197} [2023-01-27 20:18:07,028 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-01-27 20:18:07,028 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1197 transitions, 29697 flow [2023-01-27 20:18:07,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:07,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:07,029 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:07,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:07,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:07,234 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:07,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1744538243, now seen corresponding path program 47 times [2023-01-27 20:18:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:07,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545334182] [2023-01-27 20:18:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545334182] [2023-01-27 20:18:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545334182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659777823] [2023-01-27 20:18:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:18:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:07,843 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) [2023-01-27 20:18:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 20:18:08,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:18:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:18:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:08,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 126 [2023-01-27 20:18:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 20:18:08,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:11,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:11,361 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 213 [2023-01-27 20:18:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659777823] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 30 [2023-01-27 20:18:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425009041] [2023-01-27 20:18:11,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:18:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:18:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:18:11,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 562 [2023-01-27 20:18:11,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1197 transitions, 29697 flow. Second operand has 31 states, 31 states have (on average 172.8709677419355) internal successors, (5359), 31 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:11,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:11,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 562 [2023-01-27 20:18:11,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:21,448 INFO L130 PetriNetUnfolder]: 3651/7459 cut-off events. [2023-01-27 20:18:21,448 INFO L131 PetriNetUnfolder]: For 222256/222256 co-relation queries the response was YES. [2023-01-27 20:18:21,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 7459 events. 3651/7459 cut-off events. For 222256/222256 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63808 event pairs, 839 based on Foata normal form. 13/7472 useless extension candidates. Maximal degree in co-relation 72944. Up to 4356 conditions per place. [2023-01-27 20:18:21,532 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 941 selfloop transitions, 466 changer transitions 25/1432 dead transitions. [2023-01-27 20:18:21,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1432 transitions, 36724 flow [2023-01-27 20:18:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 20:18:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 20:18:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 7221 transitions. [2023-01-27 20:18:21,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3133842548389897 [2023-01-27 20:18:21,537 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 7221 transitions. [2023-01-27 20:18:21,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 7221 transitions. [2023-01-27 20:18:21,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:21,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 7221 transitions. [2023-01-27 20:18:21,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 176.1219512195122) internal successors, (7221), 41 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:21,551 INFO L175 Difference]: Start difference. First operand has 476 places, 1197 transitions, 29697 flow. Second operand 41 states and 7221 transitions. [2023-01-27 20:18:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1432 transitions, 36724 flow [2023-01-27 20:18:24,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1432 transitions, 35889 flow, removed 398 selfloop flow, removed 10 redundant places. [2023-01-27 20:18:24,401 INFO L231 Difference]: Finished difference. Result has 519 places, 1290 transitions, 32655 flow [2023-01-27 20:18:24,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=28899, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32655, PETRI_PLACES=519, PETRI_TRANSITIONS=1290} [2023-01-27 20:18:24,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2023-01-27 20:18:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1290 transitions, 32655 flow [2023-01-27 20:18:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 172.8709677419355) internal successors, (5359), 31 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:24,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:24,403 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:24,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:24,607 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,SelfDestructingSolverStorable63 [2023-01-27 20:18:24,608 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:24,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -131688167, now seen corresponding path program 48 times [2023-01-27 20:18:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:24,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257487729] [2023-01-27 20:18:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:18:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257487729] [2023-01-27 20:18:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257487729] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361748683] [2023-01-27 20:18:25,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:18:25,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:25,620 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) [2023-01-27 20:18:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 20:18:25,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:18:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:18:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:26,158 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 150 treesize of output 84 [2023-01-27 20:18:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:26,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:27,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:27,435 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 193 treesize of output 137 [2023-01-27 20:18:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361748683] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:27,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:18:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787300014] [2023-01-27 20:18:27,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:18:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:18:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:18:27,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:18:27,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1290 transitions, 32655 flow. Second operand has 32 states, 32 states have (on average 161.59375) internal successors, (5171), 32 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:27,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:27,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:18:27,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:36,419 INFO L130 PetriNetUnfolder]: 3966/8108 cut-off events. [2023-01-27 20:18:36,420 INFO L131 PetriNetUnfolder]: For 255171/255171 co-relation queries the response was YES. [2023-01-27 20:18:36,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81258 conditions, 8108 events. 3966/8108 cut-off events. For 255171/255171 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 70497 event pairs, 910 based on Foata normal form. 39/8147 useless extension candidates. Maximal degree in co-relation 81092. Up to 4307 conditions per place. [2023-01-27 20:18:36,517 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1062 selfloop transitions, 451 changer transitions 47/1560 dead transitions. [2023-01-27 20:18:36,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1560 transitions, 41470 flow [2023-01-27 20:18:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 20:18:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 20:18:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6765 transitions. [2023-01-27 20:18:36,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29359430604982206 [2023-01-27 20:18:36,522 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6765 transitions. [2023-01-27 20:18:36,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6765 transitions. [2023-01-27 20:18:36,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:36,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6765 transitions. [2023-01-27 20:18:36,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:36,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:36,537 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:36,537 INFO L175 Difference]: Start difference. First operand has 519 places, 1290 transitions, 32655 flow. Second operand 41 states and 6765 transitions. [2023-01-27 20:18:36,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1560 transitions, 41470 flow [2023-01-27 20:18:39,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1560 transitions, 39635 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-01-27 20:18:39,739 INFO L231 Difference]: Finished difference. Result has 547 places, 1402 transitions, 35645 flow [2023-01-27 20:18:39,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=30610, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=35645, PETRI_PLACES=547, PETRI_TRANSITIONS=1402} [2023-01-27 20:18:39,740 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-01-27 20:18:39,740 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1402 transitions, 35645 flow [2023-01-27 20:18:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.59375) internal successors, (5171), 32 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:39,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:39,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:39,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:39,941 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,SelfDestructingSolverStorable64 [2023-01-27 20:18:39,941 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:39,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash -195925735, now seen corresponding path program 49 times [2023-01-27 20:18:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703773214] [2023-01-27 20:18:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703773214] [2023-01-27 20:18:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703773214] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926626616] [2023-01-27 20:18:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:18:40,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:40,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:40,610 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) [2023-01-27 20:18:40,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 20:18:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:18:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:41,216 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 176 treesize of output 112 [2023-01-27 20:18:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 20:18:41,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:42,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:42,767 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 355 treesize of output 215 [2023-01-27 20:18:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926626616] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:42,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:42,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-01-27 20:18:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848706811] [2023-01-27 20:18:42,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:42,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 20:18:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 20:18:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-01-27 20:18:42,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 562 [2023-01-27 20:18:42,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1402 transitions, 35645 flow. Second operand has 28 states, 28 states have (on average 172.75) internal successors, (4837), 28 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:42,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:42,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 562 [2023-01-27 20:18:42,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:49,176 INFO L130 PetriNetUnfolder]: 4124/8285 cut-off events. [2023-01-27 20:18:49,176 INFO L131 PetriNetUnfolder]: For 269918/269918 co-relation queries the response was YES. [2023-01-27 20:18:49,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83964 conditions, 8285 events. 4124/8285 cut-off events. For 269918/269918 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 71093 event pairs, 613 based on Foata normal form. 6/8291 useless extension candidates. Maximal degree in co-relation 83786. Up to 3011 conditions per place. [2023-01-27 20:18:49,272 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 918 selfloop transitions, 651 changer transitions 19/1588 dead transitions. [2023-01-27 20:18:49,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1588 transitions, 42956 flow [2023-01-27 20:18:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 20:18:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 20:18:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5443 transitions. [2023-01-27 20:18:49,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31242107679944897 [2023-01-27 20:18:49,275 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5443 transitions. [2023-01-27 20:18:49,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5443 transitions. [2023-01-27 20:18:49,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:49,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5443 transitions. [2023-01-27 20:18:49,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 175.58064516129033) internal successors, (5443), 31 states have internal predecessors, (5443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:49,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:49,285 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:49,285 INFO L175 Difference]: Start difference. First operand has 547 places, 1402 transitions, 35645 flow. Second operand 31 states and 5443 transitions. [2023-01-27 20:18:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1588 transitions, 42956 flow [2023-01-27 20:18:52,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1588 transitions, 42032 flow, removed 414 selfloop flow, removed 18 redundant places. [2023-01-27 20:18:52,975 INFO L231 Difference]: Finished difference. Result has 566 places, 1514 transitions, 39639 flow [2023-01-27 20:18:52,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=34765, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=39639, PETRI_PLACES=566, PETRI_TRANSITIONS=1514} [2023-01-27 20:18:52,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 545 predicate places. [2023-01-27 20:18:52,976 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1514 transitions, 39639 flow [2023-01-27 20:18:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 172.75) internal successors, (4837), 28 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:52,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:18:52,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:18:52,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 20:18:53,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:53,177 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:18:53,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:18:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1146111613, now seen corresponding path program 50 times [2023-01-27 20:18:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:18:53,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351677618] [2023-01-27 20:18:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:18:53,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:18:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:18:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:18:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351677618] [2023-01-27 20:18:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351677618] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:18:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176074198] [2023-01-27 20:18:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:18:53,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:18:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:18:53,956 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) [2023-01-27 20:18:53,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 20:18:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:18:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:18:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:18:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:18:54,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:54,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-27 20:18:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:54,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:18:57,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:18:57,302 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 360 treesize of output 188 [2023-01-27 20:18:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:18:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176074198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:18:57,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:18:57,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-27 20:18:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399857872] [2023-01-27 20:18:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:18:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:18:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:18:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:18:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:18:57,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:18:57,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1514 transitions, 39639 flow. Second operand has 26 states, 26 states have (on average 177.84615384615384) internal successors, (4624), 26 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:57,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:18:57,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:18:57,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:05,222 INFO L130 PetriNetUnfolder]: 4209/8422 cut-off events. [2023-01-27 20:19:05,223 INFO L131 PetriNetUnfolder]: For 290393/290393 co-relation queries the response was YES. [2023-01-27 20:19:05,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87118 conditions, 8422 events. 4209/8422 cut-off events. For 290393/290393 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 72307 event pairs, 732 based on Foata normal form. 8/8430 useless extension candidates. Maximal degree in co-relation 86939. Up to 3180 conditions per place. [2023-01-27 20:19:05,321 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1034 selfloop transitions, 580 changer transitions 25/1639 dead transitions. [2023-01-27 20:19:05,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1639 transitions, 44515 flow [2023-01-27 20:19:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 20:19:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 20:19:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6509 transitions. [2023-01-27 20:19:05,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217180703835508 [2023-01-27 20:19:05,325 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6509 transitions. [2023-01-27 20:19:05,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6509 transitions. [2023-01-27 20:19:05,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:05,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6509 transitions. [2023-01-27 20:19:05,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 180.80555555555554) internal successors, (6509), 36 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,337 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:05,337 INFO L175 Difference]: Start difference. First operand has 566 places, 1514 transitions, 39639 flow. Second operand 36 states and 6509 transitions. [2023-01-27 20:19:05,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1639 transitions, 44515 flow [2023-01-27 20:19:09,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1639 transitions, 43341 flow, removed 445 selfloop flow, removed 17 redundant places. [2023-01-27 20:19:09,080 INFO L231 Difference]: Finished difference. Result has 590 places, 1549 transitions, 40749 flow [2023-01-27 20:19:09,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40749, PETRI_PLACES=590, PETRI_TRANSITIONS=1549} [2023-01-27 20:19:09,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 569 predicate places. [2023-01-27 20:19:09,081 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1549 transitions, 40749 flow [2023-01-27 20:19:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.84615384615384) internal successors, (4624), 26 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:09,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:09,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:09,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:09,288 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,SelfDestructingSolverStorable66 [2023-01-27 20:19:09,288 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:09,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2034591411, now seen corresponding path program 51 times [2023-01-27 20:19:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248611314] [2023-01-27 20:19:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248611314] [2023-01-27 20:19:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248611314] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763814423] [2023-01-27 20:19:10,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:19:10,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:10,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:10,041 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) [2023-01-27 20:19:10,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 20:19:10,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:19:10,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:19:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:19:10,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:11,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:11,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 123 [2023-01-27 20:19:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:11,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:13,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:13,502 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-01-27 20:19:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:14,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763814423] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:14,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:14,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2023-01-27 20:19:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418209491] [2023-01-27 20:19:14,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:19:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:19:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:19:14,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:19:14,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1549 transitions, 40749 flow. Second operand has 30 states, 30 states have (on average 177.9) internal successors, (5337), 30 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:14,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:14,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:19:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:21,990 INFO L130 PetriNetUnfolder]: 4383/8793 cut-off events. [2023-01-27 20:19:21,991 INFO L131 PetriNetUnfolder]: For 315598/315598 co-relation queries the response was YES. [2023-01-27 20:19:22,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91956 conditions, 8793 events. 4383/8793 cut-off events. For 315598/315598 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 76302 event pairs, 746 based on Foata normal form. 7/8800 useless extension candidates. Maximal degree in co-relation 91770. Up to 3252 conditions per place. [2023-01-27 20:19:22,102 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1010 selfloop transitions, 682 changer transitions 13/1705 dead transitions. [2023-01-27 20:19:22,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1705 transitions, 47634 flow [2023-01-27 20:19:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 20:19:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 20:19:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5608 transitions. [2023-01-27 20:19:22,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32189186086557225 [2023-01-27 20:19:22,106 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5608 transitions. [2023-01-27 20:19:22,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5608 transitions. [2023-01-27 20:19:22,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:22,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5608 transitions. [2023-01-27 20:19:22,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 180.90322580645162) internal successors, (5608), 31 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:22,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:22,116 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:22,116 INFO L175 Difference]: Start difference. First operand has 590 places, 1549 transitions, 40749 flow. Second operand 31 states and 5608 transitions. [2023-01-27 20:19:22,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1705 transitions, 47634 flow [2023-01-27 20:19:25,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1705 transitions, 47179 flow, removed 173 selfloop flow, removed 16 redundant places. [2023-01-27 20:19:25,942 INFO L231 Difference]: Finished difference. Result has 608 places, 1610 transitions, 43876 flow [2023-01-27 20:19:25,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=40314, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43876, PETRI_PLACES=608, PETRI_TRANSITIONS=1610} [2023-01-27 20:19:25,943 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 587 predicate places. [2023-01-27 20:19:25,943 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1610 transitions, 43876 flow [2023-01-27 20:19:25,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 177.9) internal successors, (5337), 30 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:25,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:25,944 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:25,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:26,144 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,SelfDestructingSolverStorable67 [2023-01-27 20:19:26,145 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:26,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash -956207045, now seen corresponding path program 52 times [2023-01-27 20:19:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:26,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457768013] [2023-01-27 20:19:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:26,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457768013] [2023-01-27 20:19:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457768013] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892505306] [2023-01-27 20:19:26,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:19:26,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:26,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:26,907 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) [2023-01-27 20:19:26,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 20:19:27,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:19:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:19:27,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:19:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:27,591 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 208 treesize of output 112 [2023-01-27 20:19:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:27,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:29,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:29,571 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 326 treesize of output 200 [2023-01-27 20:19:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:29,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892505306] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:29,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:19:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473368725] [2023-01-27 20:19:29,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:19:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:19:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:19:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:19:29,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1610 transitions, 43876 flow. Second operand has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:29,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:29,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:19:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:39,827 INFO L130 PetriNetUnfolder]: 5064/9904 cut-off events. [2023-01-27 20:19:39,827 INFO L131 PetriNetUnfolder]: For 403831/403831 co-relation queries the response was YES. [2023-01-27 20:19:39,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109305 conditions, 9904 events. 5064/9904 cut-off events. For 403831/403831 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 85422 event pairs, 1002 based on Foata normal form. 11/9915 useless extension candidates. Maximal degree in co-relation 109112. Up to 4962 conditions per place. [2023-01-27 20:19:39,952 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1314 selfloop transitions, 623 changer transitions 26/1963 dead transitions. [2023-01-27 20:19:39,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1963 transitions, 56683 flow [2023-01-27 20:19:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 20:19:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 20:19:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7254 transitions. [2023-01-27 20:19:39,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32268683274021354 [2023-01-27 20:19:39,957 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7254 transitions. [2023-01-27 20:19:39,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7254 transitions. [2023-01-27 20:19:39,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:39,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7254 transitions. [2023-01-27 20:19:39,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 181.35) internal successors, (7254), 40 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:39,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:39,970 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:39,970 INFO L175 Difference]: Start difference. First operand has 608 places, 1610 transitions, 43876 flow. Second operand 40 states and 7254 transitions. [2023-01-27 20:19:39,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1963 transitions, 56683 flow [2023-01-27 20:19:45,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1963 transitions, 56194 flow, removed 224 selfloop flow, removed 13 redundant places. [2023-01-27 20:19:45,138 INFO L231 Difference]: Finished difference. Result has 645 places, 1809 transitions, 51704 flow [2023-01-27 20:19:45,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=43399, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51704, PETRI_PLACES=645, PETRI_TRANSITIONS=1809} [2023-01-27 20:19:45,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-01-27 20:19:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1809 transitions, 51704 flow [2023-01-27 20:19:45,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:45,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:19:45,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:19:45,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-27 20:19:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:45,346 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:19:45,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:19:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1734035139, now seen corresponding path program 53 times [2023-01-27 20:19:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:19:45,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061953542] [2023-01-27 20:19:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:19:45,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:19:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:19:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:19:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061953542] [2023-01-27 20:19:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061953542] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:19:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075125576] [2023-01-27 20:19:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:19:46,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:19:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:19:46,133 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) [2023-01-27 20:19:46,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 20:19:46,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:19:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:19:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 20:19:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:19:46,652 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 178 treesize of output 100 [2023-01-27 20:19:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:46,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:19:48,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:19:48,770 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 338 treesize of output 216 [2023-01-27 20:19:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:19:49,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075125576] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:19:49,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:19:49,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-27 20:19:49,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655389688] [2023-01-27 20:19:49,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:19:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:19:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:19:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:19:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:19:49,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:19:49,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1809 transitions, 51704 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:49,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:19:49,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:19:49,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:19:58,738 INFO L130 PetriNetUnfolder]: 5221/10184 cut-off events. [2023-01-27 20:19:58,738 INFO L131 PetriNetUnfolder]: For 442274/442274 co-relation queries the response was YES. [2023-01-27 20:19:58,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116369 conditions, 10184 events. 5221/10184 cut-off events. For 442274/442274 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 87950 event pairs, 801 based on Foata normal form. 24/10208 useless extension candidates. Maximal degree in co-relation 116163. Up to 3528 conditions per place. [2023-01-27 20:19:59,127 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1231 selfloop transitions, 735 changer transitions 17/1983 dead transitions. [2023-01-27 20:19:59,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1983 transitions, 60096 flow [2023-01-27 20:19:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 20:19:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 20:19:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5256 transitions. [2023-01-27 20:19:59,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32249355749171676 [2023-01-27 20:19:59,131 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5256 transitions. [2023-01-27 20:19:59,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5256 transitions. [2023-01-27 20:19:59,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:19:59,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5256 transitions. [2023-01-27 20:19:59,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 181.24137931034483) internal successors, (5256), 29 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:59,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:59,140 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:19:59,141 INFO L175 Difference]: Start difference. First operand has 645 places, 1809 transitions, 51704 flow. Second operand 29 states and 5256 transitions. [2023-01-27 20:19:59,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1983 transitions, 60096 flow [2023-01-27 20:20:04,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1983 transitions, 58103 flow, removed 953 selfloop flow, removed 14 redundant places. [2023-01-27 20:20:04,759 INFO L231 Difference]: Finished difference. Result has 664 places, 1892 transitions, 54797 flow [2023-01-27 20:20:04,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=49579, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54797, PETRI_PLACES=664, PETRI_TRANSITIONS=1892} [2023-01-27 20:20:04,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 643 predicate places. [2023-01-27 20:20:04,760 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1892 transitions, 54797 flow [2023-01-27 20:20:04,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:04,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:04,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:04,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-01-27 20:20:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:04,962 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:04,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash -649434927, now seen corresponding path program 54 times [2023-01-27 20:20:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268310763] [2023-01-27 20:20:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:04,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:05,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268310763] [2023-01-27 20:20:05,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268310763] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345719131] [2023-01-27 20:20:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:20:05,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:05,567 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) [2023-01-27 20:20:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 20:20:05,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:20:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 20:20:05,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:06,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:06,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2023-01-27 20:20:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:06,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:09,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:09,099 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-01-27 20:20:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:09,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345719131] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:09,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:09,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:20:09,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760855043] [2023-01-27 20:20:09,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:09,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:20:09,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:20:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:20:09,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:20:09,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1892 transitions, 54797 flow. Second operand has 27 states, 27 states have (on average 177.74074074074073) internal successors, (4799), 27 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:09,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:09,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:20:09,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:19,291 INFO L130 PetriNetUnfolder]: 5326/10362 cut-off events. [2023-01-27 20:20:19,291 INFO L131 PetriNetUnfolder]: For 463816/463816 co-relation queries the response was YES. [2023-01-27 20:20:19,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119532 conditions, 10362 events. 5326/10362 cut-off events. For 463816/463816 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 89578 event pairs, 844 based on Foata normal form. 9/10371 useless extension candidates. Maximal degree in co-relation 119320. Up to 3780 conditions per place. [2023-01-27 20:20:19,439 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1199 selfloop transitions, 833 changer transitions 22/2054 dead transitions. [2023-01-27 20:20:19,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2054 transitions, 63044 flow [2023-01-27 20:20:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 20:20:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 20:20:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4882 transitions. [2023-01-27 20:20:19,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217345459338342 [2023-01-27 20:20:19,442 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4882 transitions. [2023-01-27 20:20:19,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4882 transitions. [2023-01-27 20:20:19,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:19,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4882 transitions. [2023-01-27 20:20:19,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 180.8148148148148) internal successors, (4882), 27 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:19,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:19,451 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:19,451 INFO L175 Difference]: Start difference. First operand has 664 places, 1892 transitions, 54797 flow. Second operand 27 states and 4882 transitions. [2023-01-27 20:20:19,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2054 transitions, 63044 flow [2023-01-27 20:20:25,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2054 transitions, 62329 flow, removed 307 selfloop flow, removed 19 redundant places. [2023-01-27 20:20:25,899 INFO L231 Difference]: Finished difference. Result has 683 places, 1966 transitions, 59469 flow [2023-01-27 20:20:25,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=54090, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59469, PETRI_PLACES=683, PETRI_TRANSITIONS=1966} [2023-01-27 20:20:25,900 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 662 predicate places. [2023-01-27 20:20:25,901 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1966 transitions, 59469 flow [2023-01-27 20:20:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.74074074074073) internal successors, (4799), 27 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:25,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-01-27 20:20:26,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:26,107 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:26,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1697031517, now seen corresponding path program 55 times [2023-01-27 20:20:26,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:26,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14572335] [2023-01-27 20:20:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:26,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:20:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14572335] [2023-01-27 20:20:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14572335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496546797] [2023-01-27 20:20:26,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:20:26,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:26,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:26,943 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) [2023-01-27 20:20:26,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 20:20:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:20:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:27,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:27,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-01-27 20:20:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:27,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:29,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:29,853 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 195 [2023-01-27 20:20:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:30,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496546797] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:30,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:30,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:20:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284130372] [2023-01-27 20:20:30,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:30,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:20:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:20:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:20:30,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:20:30,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1966 transitions, 59469 flow. Second operand has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:30,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:30,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:20:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:20:44,351 INFO L130 PetriNetUnfolder]: 5350/10392 cut-off events. [2023-01-27 20:20:44,351 INFO L131 PetriNetUnfolder]: For 527893/527893 co-relation queries the response was YES. [2023-01-27 20:20:44,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 10392 events. 5350/10392 cut-off events. For 527893/527893 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 89739 event pairs, 668 based on Foata normal form. 4/10396 useless extension candidates. Maximal degree in co-relation 123951. Up to 3187 conditions per place. [2023-01-27 20:20:44,497 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 868 selfloop transitions, 1208 changer transitions 7/2083 dead transitions. [2023-01-27 20:20:44,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2083 transitions, 65648 flow [2023-01-27 20:20:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 20:20:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 20:20:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6568 transitions. [2023-01-27 20:20:44,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2921708185053381 [2023-01-27 20:20:44,501 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6568 transitions. [2023-01-27 20:20:44,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6568 transitions. [2023-01-27 20:20:44,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:20:44,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6568 transitions. [2023-01-27 20:20:44,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 164.2) internal successors, (6568), 40 states have internal predecessors, (6568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:44,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:44,513 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:44,513 INFO L175 Difference]: Start difference. First operand has 683 places, 1966 transitions, 59469 flow. Second operand 40 states and 6568 transitions. [2023-01-27 20:20:44,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2083 transitions, 65648 flow [2023-01-27 20:20:52,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2083 transitions, 65094 flow, removed 241 selfloop flow, removed 13 redundant places. [2023-01-27 20:20:52,107 INFO L231 Difference]: Finished difference. Result has 708 places, 2010 transitions, 62946 flow [2023-01-27 20:20:52,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=58941, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=62946, PETRI_PLACES=708, PETRI_TRANSITIONS=2010} [2023-01-27 20:20:52,108 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 687 predicate places. [2023-01-27 20:20:52,108 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 2010 transitions, 62946 flow [2023-01-27 20:20:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:52,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:52,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:52,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 20:20:52,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:52,314 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:20:52,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash 962861267, now seen corresponding path program 56 times [2023-01-27 20:20:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:52,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668617936] [2023-01-27 20:20:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:20:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668617936] [2023-01-27 20:20:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668617936] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851954681] [2023-01-27 20:20:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:20:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:53,329 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) [2023-01-27 20:20:53,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 20:20:53,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:20:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:53,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:20:53,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:54,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:54,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 121 [2023-01-27 20:20:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:54,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:57,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:57,153 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 203 [2023-01-27 20:20:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851954681] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:57,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:57,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:20:57,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908685595] [2023-01-27 20:20:57,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:20:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:20:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:20:57,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:20:57,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 2010 transitions, 62946 flow. Second operand has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:57,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:57,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:20:57,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:21:11,203 INFO L130 PetriNetUnfolder]: 5528/10726 cut-off events. [2023-01-27 20:21:11,203 INFO L131 PetriNetUnfolder]: For 585054/585054 co-relation queries the response was YES. [2023-01-27 20:21:11,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131969 conditions, 10726 events. 5528/10726 cut-off events. For 585054/585054 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 92967 event pairs, 1199 based on Foata normal form. 13/10739 useless extension candidates. Maximal degree in co-relation 131745. Up to 6082 conditions per place. [2023-01-27 20:21:11,353 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1451 selfloop transitions, 748 changer transitions 23/2222 dead transitions. [2023-01-27 20:21:11,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2222 transitions, 72174 flow [2023-01-27 20:21:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 20:21:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 20:21:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6925 transitions. [2023-01-27 20:21:11,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29338247754617863 [2023-01-27 20:21:11,357 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6925 transitions. [2023-01-27 20:21:11,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6925 transitions. [2023-01-27 20:21:11,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:21:11,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6925 transitions. [2023-01-27 20:21:11,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 164.88095238095238) internal successors, (6925), 42 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:11,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:11,370 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:11,370 INFO L175 Difference]: Start difference. First operand has 708 places, 2010 transitions, 62946 flow. Second operand 42 states and 6925 transitions. [2023-01-27 20:21:11,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2222 transitions, 72174 flow [2023-01-27 20:21:19,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2222 transitions, 69362 flow, removed 217 selfloop flow, removed 28 redundant places. [2023-01-27 20:21:19,552 INFO L231 Difference]: Finished difference. Result has 729 places, 2079 transitions, 64213 flow [2023-01-27 20:21:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=60239, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=64213, PETRI_PLACES=729, PETRI_TRANSITIONS=2079} [2023-01-27 20:21:19,554 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 708 predicate places. [2023-01-27 20:21:19,554 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 2079 transitions, 64213 flow [2023-01-27 20:21:19,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:19,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:21:19,554 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:21:19,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 20:21:19,755 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,SelfDestructingSolverStorable72 [2023-01-27 20:21:19,755 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:21:19,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:21:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash 939150035, now seen corresponding path program 57 times [2023-01-27 20:21:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:21:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117092631] [2023-01-27 20:21:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:21:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:21:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:21:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:21:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:21:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117092631] [2023-01-27 20:21:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117092631] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:21:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395090505] [2023-01-27 20:21:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:21:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:21:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:21:20,452 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) [2023-01-27 20:21:20,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 20:21:20,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:21:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:21:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:21:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:21:21,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:21:21,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 134 [2023-01-27 20:21:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:21:21,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:21:23,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:21:23,107 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 257 treesize of output 163 [2023-01-27 20:21:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:21:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395090505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:21:23,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:21:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-01-27 20:21:23,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381443757] [2023-01-27 20:21:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:21:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:21:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:21:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:21:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-01-27 20:21:23,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:21:23,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 2079 transitions, 64213 flow. Second operand has 29 states, 29 states have (on average 177.82758620689654) internal successors, (5157), 29 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:23,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:21:23,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:21:23,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:21:35,225 INFO L130 PetriNetUnfolder]: 5554/10767 cut-off events. [2023-01-27 20:21:35,226 INFO L131 PetriNetUnfolder]: For 554874/554874 co-relation queries the response was YES. [2023-01-27 20:21:35,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130728 conditions, 10767 events. 5554/10767 cut-off events. For 554874/554874 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 93464 event pairs, 16 based on Foata normal form. 6/10773 useless extension candidates. Maximal degree in co-relation 130496. Up to 5198 conditions per place. [2023-01-27 20:21:35,488 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1215 selfloop transitions, 1061 changer transitions 12/2288 dead transitions. [2023-01-27 20:21:35,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2288 transitions, 72763 flow [2023-01-27 20:21:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 20:21:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 20:21:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6146 transitions. [2023-01-27 20:21:35,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216453841323006 [2023-01-27 20:21:35,494 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6146 transitions. [2023-01-27 20:21:35,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6146 transitions. [2023-01-27 20:21:35,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:21:35,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6146 transitions. [2023-01-27 20:21:35,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 180.76470588235293) internal successors, (6146), 34 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:35,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:35,508 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:35,508 INFO L175 Difference]: Start difference. First operand has 729 places, 2079 transitions, 64213 flow. Second operand 34 states and 6146 transitions. [2023-01-27 20:21:35,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2288 transitions, 72763 flow [2023-01-27 20:21:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 2288 transitions, 71782 flow, removed 262 selfloop flow, removed 29 redundant places. [2023-01-27 20:21:43,075 INFO L231 Difference]: Finished difference. Result has 739 places, 2109 transitions, 66480 flow [2023-01-27 20:21:43,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=63306, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=66480, PETRI_PLACES=739, PETRI_TRANSITIONS=2109} [2023-01-27 20:21:43,076 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-01-27 20:21:43,076 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 2109 transitions, 66480 flow [2023-01-27 20:21:43,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 177.82758620689654) internal successors, (5157), 29 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:43,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:21:43,077 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:21:43,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-27 20:21:43,277 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,SelfDestructingSolverStorable73 [2023-01-27 20:21:43,278 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:21:43,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:21:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 160769689, now seen corresponding path program 58 times [2023-01-27 20:21:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:21:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148343970] [2023-01-27 20:21:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:21:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:21:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:21:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:21:44,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:21:44,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148343970] [2023-01-27 20:21:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148343970] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:21:44,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583012186] [2023-01-27 20:21:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:21:44,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:21:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:21:44,047 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) [2023-01-27 20:21:44,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-27 20:21:44,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:21:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:21:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:21:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:21:44,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:21:44,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-27 20:21:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:21:44,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:21:47,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:21:47,340 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 209 [2023-01-27 20:21:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:21:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583012186] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:21:47,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:21:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:21:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073815066] [2023-01-27 20:21:47,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:21:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:21:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:21:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:21:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:21:47,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:21:47,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 2109 transitions, 66480 flow. Second operand has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:21:47,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:21:47,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:21:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:22:13,853 INFO L130 PetriNetUnfolder]: 8237/16477 cut-off events. [2023-01-27 20:22:13,853 INFO L131 PetriNetUnfolder]: For 905891/905891 co-relation queries the response was YES. [2023-01-27 20:22:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203616 conditions, 16477 events. 8237/16477 cut-off events. For 905891/905891 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 155549 event pairs, 378 based on Foata normal form. 9/16486 useless extension candidates. Maximal degree in co-relation 203382. Up to 4330 conditions per place. [2023-01-27 20:22:14,119 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 2130 selfloop transitions, 1224 changer transitions 34/3388 dead transitions. [2023-01-27 20:22:14,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3388 transitions, 112413 flow [2023-01-27 20:22:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-27 20:22:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-27 20:22:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 9040 transitions. [2023-01-27 20:22:14,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29246198641216437 [2023-01-27 20:22:14,125 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 9040 transitions. [2023-01-27 20:22:14,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 9040 transitions. [2023-01-27 20:22:14,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:22:14,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 9040 transitions. [2023-01-27 20:22:14,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 164.36363636363637) internal successors, (9040), 55 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:14,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:14,145 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:14,145 INFO L175 Difference]: Start difference. First operand has 739 places, 2109 transitions, 66480 flow. Second operand 55 states and 9040 transitions. [2023-01-27 20:22:14,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3388 transitions, 112413 flow [2023-01-27 20:22:27,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 3388 transitions, 110001 flow, removed 468 selfloop flow, removed 13 redundant places. [2023-01-27 20:22:28,002 INFO L231 Difference]: Finished difference. Result has 801 places, 2537 transitions, 82070 flow [2023-01-27 20:22:28,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64924, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=82070, PETRI_PLACES=801, PETRI_TRANSITIONS=2537} [2023-01-27 20:22:28,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2023-01-27 20:22:28,004 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2537 transitions, 82070 flow [2023-01-27 20:22:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:28,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:22:28,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:22:28,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-27 20:22:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:22:28,211 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:22:28,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:22:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1426630437, now seen corresponding path program 59 times [2023-01-27 20:22:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:22:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893087107] [2023-01-27 20:22:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:22:28,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:22:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:22:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:22:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:22:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893087107] [2023-01-27 20:22:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893087107] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:22:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772650369] [2023-01-27 20:22:28,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:22:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:22:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:22:28,806 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) [2023-01-27 20:22:28,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-27 20:22:29,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:22:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:22:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:22:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:22:29,255 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 203 treesize of output 113 [2023-01-27 20:22:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:22:29,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:22:30,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:22:30,933 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 197 [2023-01-27 20:22:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:22:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772650369] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:22:31,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:22:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-27 20:22:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031476220] [2023-01-27 20:22:31,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:22:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:22:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:22:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:22:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:22:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:22:31,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2537 transitions, 82070 flow. Second operand has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:31,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:22:31,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:22:31,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:22:48,689 INFO L130 PetriNetUnfolder]: 8856/17886 cut-off events. [2023-01-27 20:22:48,689 INFO L131 PetriNetUnfolder]: For 1024379/1024379 co-relation queries the response was YES. [2023-01-27 20:22:48,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230688 conditions, 17886 events. 8856/17886 cut-off events. For 1024379/1024379 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 172513 event pairs, 2298 based on Foata normal form. 25/17911 useless extension candidates. Maximal degree in co-relation 230432. Up to 9799 conditions per place. [2023-01-27 20:22:48,980 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 2169 selfloop transitions, 640 changer transitions 32/2841 dead transitions. [2023-01-27 20:22:48,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2841 transitions, 98102 flow [2023-01-27 20:22:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:22:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:22:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5082 transitions. [2023-01-27 20:22:48,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32295373665480426 [2023-01-27 20:22:48,984 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5082 transitions. [2023-01-27 20:22:48,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5082 transitions. [2023-01-27 20:22:48,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:22:48,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5082 transitions. [2023-01-27 20:22:48,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 181.5) internal successors, (5082), 28 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:48,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:48,993 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:22:48,993 INFO L175 Difference]: Start difference. First operand has 801 places, 2537 transitions, 82070 flow. Second operand 28 states and 5082 transitions. [2023-01-27 20:22:48,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2841 transitions, 98102 flow [2023-01-27 20:23:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2841 transitions, 95818 flow, removed 788 selfloop flow, removed 21 redundant places. [2023-01-27 20:23:07,560 INFO L231 Difference]: Finished difference. Result has 812 places, 2673 transitions, 88257 flow [2023-01-27 20:23:07,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=80169, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=88257, PETRI_PLACES=812, PETRI_TRANSITIONS=2673} [2023-01-27 20:23:07,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-01-27 20:23:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2673 transitions, 88257 flow [2023-01-27 20:23:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:07,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:23:07,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:23:07,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-27 20:23:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:23:07,768 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:23:07,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:23:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -129823397, now seen corresponding path program 60 times [2023-01-27 20:23:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:23:07,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32810012] [2023-01-27 20:23:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:23:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:23:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:23:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:23:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:23:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32810012] [2023-01-27 20:23:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32810012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:23:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396657649] [2023-01-27 20:23:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:23:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:23:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:23:08,613 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) [2023-01-27 20:23:08,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-27 20:23:08,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:23:08,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:23:08,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:23:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:23:09,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:23:09,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 116 [2023-01-27 20:23:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:23:09,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:23:12,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:23:12,260 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 189 [2023-01-27 20:23:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:23:12,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396657649] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:23:12,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:23:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 20:23:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181998762] [2023-01-27 20:23:12,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:23:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:23:12,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:23:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:23:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:23:12,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:23:12,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2673 transitions, 88257 flow. Second operand has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:12,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:23:12,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:23:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:23:32,246 INFO L130 PetriNetUnfolder]: 8881/17887 cut-off events. [2023-01-27 20:23:32,246 INFO L131 PetriNetUnfolder]: For 1065719/1065719 co-relation queries the response was YES. [2023-01-27 20:23:32,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231270 conditions, 17887 events. 8881/17887 cut-off events. For 1065719/1065719 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 172111 event pairs, 1728 based on Foata normal form. 7/17894 useless extension candidates. Maximal degree in co-relation 231010. Up to 8774 conditions per place. [2023-01-27 20:23:32,550 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1731 selfloop transitions, 1035 changer transitions 17/2783 dead transitions. [2023-01-27 20:23:32,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 2783 transitions, 96474 flow [2023-01-27 20:23:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 20:23:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 20:23:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4932 transitions. [2023-01-27 20:23:32,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29252669039145907 [2023-01-27 20:23:32,554 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4932 transitions. [2023-01-27 20:23:32,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4932 transitions. [2023-01-27 20:23:32,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:23:32,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4932 transitions. [2023-01-27 20:23:32,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 164.4) internal successors, (4932), 30 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:32,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:32,564 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:32,564 INFO L175 Difference]: Start difference. First operand has 812 places, 2673 transitions, 88257 flow. Second operand 30 states and 4932 transitions. [2023-01-27 20:23:32,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 2783 transitions, 96474 flow [2023-01-27 20:23:52,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 2783 transitions, 95260 flow, removed 517 selfloop flow, removed 15 redundant places. [2023-01-27 20:23:52,786 INFO L231 Difference]: Finished difference. Result has 829 places, 2713 transitions, 91046 flow [2023-01-27 20:23:52,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=87055, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=91046, PETRI_PLACES=829, PETRI_TRANSITIONS=2713} [2023-01-27 20:23:52,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-01-27 20:23:52,788 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2713 transitions, 91046 flow [2023-01-27 20:23:52,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:52,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:23:52,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:23:52,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-27 20:23:52,994 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,SelfDestructingSolverStorable76 [2023-01-27 20:23:52,994 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:23:52,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:23:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1354907421, now seen corresponding path program 61 times [2023-01-27 20:23:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:23:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332066454] [2023-01-27 20:23:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:23:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:23:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:23:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:23:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:23:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332066454] [2023-01-27 20:23:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332066454] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:23:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068876510] [2023-01-27 20:23:53,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:23:53,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:23:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:23:53,619 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) [2023-01-27 20:23:53,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-27 20:23:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:23:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 20:23:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:23:54,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:23:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-01-27 20:23:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:23:54,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:23:56,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:23:56,988 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 353 treesize of output 213 [2023-01-27 20:23:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:23:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068876510] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:23:57,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:23:57,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-01-27 20:23:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19860851] [2023-01-27 20:23:57,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:23:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:23:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:23:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:23:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-01-27 20:23:57,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:23:57,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2713 transitions, 91046 flow. Second operand has 29 states, 29 states have (on average 177.89655172413794) internal successors, (5159), 29 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:23:57,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:23:57,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:23:57,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:24:16,491 INFO L130 PetriNetUnfolder]: 9027/18186 cut-off events. [2023-01-27 20:24:16,491 INFO L131 PetriNetUnfolder]: For 1144331/1144331 co-relation queries the response was YES. [2023-01-27 20:24:16,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238724 conditions, 18186 events. 9027/18186 cut-off events. For 1144331/1144331 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 175438 event pairs, 1686 based on Foata normal form. 34/18220 useless extension candidates. Maximal degree in co-relation 238458. Up to 7733 conditions per place. [2023-01-27 20:24:16,789 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1818 selfloop transitions, 1044 changer transitions 23/2885 dead transitions. [2023-01-27 20:24:16,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 2885 transitions, 102098 flow [2023-01-27 20:24:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 20:24:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 20:24:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4895 transitions. [2023-01-27 20:24:16,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225912745485699 [2023-01-27 20:24:16,792 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4895 transitions. [2023-01-27 20:24:16,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4895 transitions. [2023-01-27 20:24:16,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:24:16,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4895 transitions. [2023-01-27 20:24:16,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 181.2962962962963) internal successors, (4895), 27 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:24:16,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:24:16,801 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:24:16,801 INFO L175 Difference]: Start difference. First operand has 829 places, 2713 transitions, 91046 flow. Second operand 27 states and 4895 transitions. [2023-01-27 20:24:16,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 2885 transitions, 102098 flow [2023-01-27 20:24:37,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 2885 transitions, 100800 flow, removed 417 selfloop flow, removed 17 redundant places. [2023-01-27 20:24:37,294 INFO L231 Difference]: Finished difference. Result has 843 places, 2763 transitions, 94386 flow [2023-01-27 20:24:37,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=89776, PETRI_DIFFERENCE_MINUEND_PLACES=809, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=94386, PETRI_PLACES=843, PETRI_TRANSITIONS=2763} [2023-01-27 20:24:37,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 822 predicate places. [2023-01-27 20:24:37,296 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 2763 transitions, 94386 flow [2023-01-27 20:24:37,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 177.89655172413794) internal successors, (5159), 29 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:24:37,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:24:37,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:24:37,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-27 20:24:37,503 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,SelfDestructingSolverStorable77 [2023-01-27 20:24:37,503 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:24:37,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:24:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1595873131, now seen corresponding path program 62 times [2023-01-27 20:24:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:24:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984652780] [2023-01-27 20:24:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:24:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:24:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:24:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:24:38,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:24:38,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984652780] [2023-01-27 20:24:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984652780] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:24:38,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079932703] [2023-01-27 20:24:38,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:24:38,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:24:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:24:38,274 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:24:38,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-27 20:24:38,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:24:38,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:24:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 20:24:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:24:39,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:24:39,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 121 [2023-01-27 20:24:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:24:39,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:24:41,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:24:41,591 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 317 treesize of output 197 [2023-01-27 20:24:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:24:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079932703] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:24:41,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:24:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-27 20:24:41,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545985931] [2023-01-27 20:24:41,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:24:41,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:24:41,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:24:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:24:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:24:41,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:24:41,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 2763 transitions, 94386 flow. Second operand has 26 states, 26 states have (on average 177.76923076923077) internal successors, (4622), 26 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:24:41,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:24:41,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:24:41,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:25:01,630 INFO L130 PetriNetUnfolder]: 9162/18378 cut-off events. [2023-01-27 20:25:01,631 INFO L131 PetriNetUnfolder]: For 1222955/1222955 co-relation queries the response was YES. [2023-01-27 20:25:01,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247502 conditions, 18378 events. 9162/18378 cut-off events. For 1222955/1222955 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 176854 event pairs, 1726 based on Foata normal form. 13/18391 useless extension candidates. Maximal degree in co-relation 247233. Up to 7917 conditions per place. [2023-01-27 20:25:01,970 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1846 selfloop transitions, 1085 changer transitions 16/2947 dead transitions. [2023-01-27 20:25:01,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 2947 transitions, 106009 flow [2023-01-27 20:25:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 20:25:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 20:25:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5604 transitions. [2023-01-27 20:25:01,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32166226610033294 [2023-01-27 20:25:01,973 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5604 transitions. [2023-01-27 20:25:01,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5604 transitions. [2023-01-27 20:25:01,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:25:01,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5604 transitions. [2023-01-27 20:25:01,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 180.7741935483871) internal successors, (5604), 31 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:01,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:01,984 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:01,984 INFO L175 Difference]: Start difference. First operand has 843 places, 2763 transitions, 94386 flow. Second operand 31 states and 5604 transitions. [2023-01-27 20:25:01,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 2947 transitions, 106009 flow [2023-01-27 20:25:23,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 2947 transitions, 104929 flow, removed 301 selfloop flow, removed 14 redundant places. [2023-01-27 20:25:23,965 INFO L231 Difference]: Finished difference. Result has 869 places, 2842 transitions, 99590 flow [2023-01-27 20:25:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=93322, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=99590, PETRI_PLACES=869, PETRI_TRANSITIONS=2842} [2023-01-27 20:25:23,967 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 848 predicate places. [2023-01-27 20:25:23,968 INFO L495 AbstractCegarLoop]: Abstraction has has 869 places, 2842 transitions, 99590 flow [2023-01-27 20:25:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.76923076923077) internal successors, (4622), 26 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:23,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:25:23,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:25:23,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-27 20:25:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:25:24,169 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:25:24,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:25:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1948910203, now seen corresponding path program 63 times [2023-01-27 20:25:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:25:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864459765] [2023-01-27 20:25:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:25:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:25:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:25:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:25:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:25:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864459765] [2023-01-27 20:25:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864459765] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:25:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471727934] [2023-01-27 20:25:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:25:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:25:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:25:25,260 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:25:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-27 20:25:25,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:25:25,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:25:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 20:25:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:25:25,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:25:25,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 113 [2023-01-27 20:25:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 20:25:26,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:25:28,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:25:28,699 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 460 treesize of output 257 [2023-01-27 20:25:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:25:28,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471727934] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:25:28,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:25:28,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 33 [2023-01-27 20:25:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858004904] [2023-01-27 20:25:28,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:25:28,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 20:25:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:25:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 20:25:28,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 20:25:28,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-27 20:25:28,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 2842 transitions, 99590 flow. Second operand has 34 states, 34 states have (on average 161.64705882352942) internal successors, (5496), 34 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:28,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:25:28,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-27 20:25:28,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:25:57,634 INFO L130 PetriNetUnfolder]: 9405/18864 cut-off events. [2023-01-27 20:25:57,635 INFO L131 PetriNetUnfolder]: For 1348234/1348234 co-relation queries the response was YES. [2023-01-27 20:25:57,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259659 conditions, 18864 events. 9405/18864 cut-off events. For 1348234/1348234 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 182607 event pairs, 1920 based on Foata normal form. 18/18882 useless extension candidates. Maximal degree in co-relation 259379. Up to 9586 conditions per place. [2023-01-27 20:25:57,981 INFO L137 encePairwiseOnDemand]: 551/562 looper letters, 1937 selfloop transitions, 1088 changer transitions 29/3054 dead transitions. [2023-01-27 20:25:57,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 907 places, 3054 transitions, 111606 flow [2023-01-27 20:25:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 20:25:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 20:25:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6757 transitions. [2023-01-27 20:25:57,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29324711396580155 [2023-01-27 20:25:57,985 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6757 transitions. [2023-01-27 20:25:57,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6757 transitions. [2023-01-27 20:25:57,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:25:57,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6757 transitions. [2023-01-27 20:25:57,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 164.8048780487805) internal successors, (6757), 41 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:57,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:57,999 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:25:57,999 INFO L175 Difference]: Start difference. First operand has 869 places, 2842 transitions, 99590 flow. Second operand 41 states and 6757 transitions. [2023-01-27 20:25:57,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 907 places, 3054 transitions, 111606 flow [2023-01-27 20:26:23,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 3054 transitions, 110147 flow, removed 649 selfloop flow, removed 14 redundant places. [2023-01-27 20:26:23,612 INFO L231 Difference]: Finished difference. Result has 905 places, 2944 transitions, 105185 flow [2023-01-27 20:26:23,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=98176, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=105185, PETRI_PLACES=905, PETRI_TRANSITIONS=2944} [2023-01-27 20:26:23,614 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 884 predicate places. [2023-01-27 20:26:23,614 INFO L495 AbstractCegarLoop]: Abstraction has has 905 places, 2944 transitions, 105185 flow [2023-01-27 20:26:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 161.64705882352942) internal successors, (5496), 34 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:26:23,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:26:23,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:26:23,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-27 20:26:23,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-01-27 20:26:23,815 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:26:23,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:26:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash -515891015, now seen corresponding path program 64 times [2023-01-27 20:26:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:26:23,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655911638] [2023-01-27 20:26:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:26:23,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:26:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:26:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:26:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:26:24,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655911638] [2023-01-27 20:26:24,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655911638] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:26:24,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399108964] [2023-01-27 20:26:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:26:24,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:26:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:26:24,457 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:26:24,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-27 20:26:24,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:26:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:26:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 20:26:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:26:25,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:26:25,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 100 [2023-01-27 20:26:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:26:25,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:26:26,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:26:26,865 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 285 treesize of output 167 [2023-01-27 20:26:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:26:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399108964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:26:27,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:26:27,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-27 20:26:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176964147] [2023-01-27 20:26:27,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:26:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:26:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:26:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:26:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-01-27 20:26:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-27 20:26:27,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 2944 transitions, 105185 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:26:27,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:26:27,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-27 20:26:27,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:26:49,138 INFO L130 PetriNetUnfolder]: 9544/19123 cut-off events. [2023-01-27 20:26:49,139 INFO L131 PetriNetUnfolder]: For 1431655/1431655 co-relation queries the response was YES. [2023-01-27 20:26:49,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268077 conditions, 19123 events. 9544/19123 cut-off events. For 1431655/1431655 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 185364 event pairs, 1952 based on Foata normal form. 14/19137 useless extension candidates. Maximal degree in co-relation 267784. Up to 9689 conditions per place. [2023-01-27 20:26:49,483 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1977 selfloop transitions, 1112 changer transitions 25/3114 dead transitions. [2023-01-27 20:26:49,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 3114 transitions, 116287 flow [2023-01-27 20:26:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 20:26:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 20:26:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6692 transitions. [2023-01-27 20:26:49,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321823602962393 [2023-01-27 20:26:49,487 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6692 transitions. [2023-01-27 20:26:49,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6692 transitions. [2023-01-27 20:26:49,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:26:49,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6692 transitions. [2023-01-27 20:26:49,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 180.86486486486487) internal successors, (6692), 37 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:26:49,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:26:49,499 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:26:49,499 INFO L175 Difference]: Start difference. First operand has 905 places, 2944 transitions, 105185 flow. Second operand 37 states and 6692 transitions. [2023-01-27 20:26:49,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 3114 transitions, 116287 flow [2023-01-27 20:27:15,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 921 places, 3114 transitions, 114743 flow, removed 755 selfloop flow, removed 16 redundant places. [2023-01-27 20:27:15,842 INFO L231 Difference]: Finished difference. Result has 932 places, 3019 transitions, 109803 flow [2023-01-27 20:27:15,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=103661, PETRI_DIFFERENCE_MINUEND_PLACES=885, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=109803, PETRI_PLACES=932, PETRI_TRANSITIONS=3019} [2023-01-27 20:27:15,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2023-01-27 20:27:15,844 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 3019 transitions, 109803 flow [2023-01-27 20:27:15,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:27:15,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:27:15,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:27:15,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-27 20:27:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:27:16,051 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:27:16,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:27:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1523920965, now seen corresponding path program 65 times [2023-01-27 20:27:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:27:16,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059580140] [2023-01-27 20:27:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:27:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:27:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:27:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:27:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:27:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059580140] [2023-01-27 20:27:16,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059580140] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:27:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985399218] [2023-01-27 20:27:16,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:27:16,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:27:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:27:16,721 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:27:16,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-27 20:27:16,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:27:16,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:27:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 20:27:16,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:27:17,230 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 253 treesize of output 139 [2023-01-27 20:27:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:27:17,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:27:19,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:27:19,084 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 282 treesize of output 183 Received shutdown request... [2023-01-27 20:27:19,181 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 20:27:19,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-01-27 20:27:19,198 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:27:19,204 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 20:27:19,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:27:19,382 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-2-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-4-2-2-1 context. [2023-01-27 20:27:19,384 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 20:27:19,384 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 20:27:19,384 INFO L445 BasicCegarLoop]: Path program histogram: [65, 6, 6, 4, 1] [2023-01-27 20:27:19,387 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 20:27:19,387 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 20:27:19,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 08:27:19 BasicIcfg [2023-01-27 20:27:19,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 20:27:19,389 INFO L158 Benchmark]: Toolchain (without parser) took 787831.14ms. Allocated memory was 373.3MB in the beginning and 5.4GB in the end (delta: 5.1GB). Free memory was 301.5MB in the beginning and 2.5GB in the end (delta: -2.2GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-27 20:27:19,389 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 317.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 20:27:19,389 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.81ms. Allocated memory is still 373.3MB. Free memory was 301.5MB in the beginning and 288.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 20:27:19,390 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.45ms. Allocated memory is still 373.3MB. Free memory was 288.9MB in the beginning and 286.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:27:19,390 INFO L158 Benchmark]: Boogie Preprocessor took 26.49ms. Allocated memory is still 373.3MB. Free memory was 286.8MB in the beginning and 284.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:27:19,390 INFO L158 Benchmark]: RCFGBuilder took 483.90ms. Allocated memory is still 373.3MB. Free memory was 284.7MB in the beginning and 263.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 20:27:19,391 INFO L158 Benchmark]: TraceAbstraction took 787067.33ms. Allocated memory was 373.3MB in the beginning and 5.4GB in the end (delta: 5.1GB). Free memory was 262.6MB in the beginning and 2.5GB in the end (delta: -2.2GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-27 20:27:19,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 317.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 220.81ms. Allocated memory is still 373.3MB. Free memory was 301.5MB in the beginning and 288.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.45ms. Allocated memory is still 373.3MB. Free memory was 288.9MB in the beginning and 286.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.49ms. Allocated memory is still 373.3MB. Free memory was 286.8MB in the beginning and 284.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 483.90ms. Allocated memory is still 373.3MB. Free memory was 284.7MB in the beginning and 263.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 787067.33ms. Allocated memory was 373.3MB in the beginning and 5.4GB in the end (delta: 5.1GB). Free memory was 262.6MB in the beginning and 2.5GB in the end (delta: -2.2GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.2s, 238 PlacesBefore, 21 PlacesAfterwards, 250 TransitionsBefore, 17 TransitionsAfterwards, 9828 CoEnabledTransitionPairs, 8 FixpointIterations, 106 TrivialSequentialCompositions, 118 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 48 ConcurrentYvCompositions, 16 ChoiceCompositions, 302 TotalNumberOfCompositions, 8979 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8815, independent: 8803, independent conditional: 0, independent unconditional: 8803, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5971, independent: 5966, independent conditional: 0, independent unconditional: 5966, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8815, independent: 2837, independent conditional: 0, independent unconditional: 2837, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 5971, unknown conditional: 0, unknown unconditional: 5971] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, 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: 113]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-2-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-4-2-2-1 context. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-2-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-4-2-2-1 context. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-2-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-4-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 358 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: 787.0s, OverallIterations: 82, TraceHistogramMax: 4, PathProgramHistogramMax: 65, EmptinessCheckTime: 0.0s, AutomataDifference: 597.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11356 SdHoareTripleChecker+Valid, 28.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11356 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 25.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 98 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2041 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50224 IncrementalHoareTripleChecker+Invalid, 52363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2041 mSolverCounterUnsat, 0 mSDtfsCounter, 50224 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5224 GetRequests, 2351 SyntacticMatches, 18 SemanticMatches, 2855 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 31435 ImplicationChecksByTransitivity, 171.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109803occurred in iteration=81, InterpolantAutomatonStates: 1570, 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: 0.9s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 153.8s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2913 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4035 ConstructedInterpolants, 6 QuantifiedInterpolants, 94944 SizeOfPredicates, 2012 NumberOfNonLiveVariables, 15107 ConjunctsInSsa, 2768 ConjunctsInUnsatCore, 213 InterpolantComputations, 16 PerfectInterpolantSequences, 1298/2140 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