/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 12:03:12,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 12:03:12,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 12:03:12,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 12:03:12,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 12:03:12,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 12:03:12,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 12:03:12,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 12:03:12,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 12:03:12,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 12:03:12,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 12:03:12,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 12:03:12,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 12:03:12,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 12:03:12,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 12:03:12,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 12:03:12,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 12:03:12,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 12:03:12,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 12:03:12,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 12:03:12,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 12:03:12,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 12:03:12,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 12:03:12,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 12:03:12,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 12:03:12,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 12:03:12,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 12:03:12,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 12:03:12,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 12:03:12,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 12:03:12,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 12:03:12,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 12:03:12,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 12:03:12,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 12:03:12,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 12:03:12,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 12:03:12,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 12:03:12,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 12:03:12,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 12:03:12,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 12:03:12,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 12:03:12,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 12:03:12,215 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 12:03:12,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 12:03:12,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 12:03:12,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 12:03:12,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 12:03:12,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 12:03:12,217 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 12:03:12,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 12:03:12,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 12:03:12,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 12:03:12,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:03:12,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 12:03:12,220 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 12:03:12,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 12:03:12,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 12:03:12,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 12:03:12,440 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 12:03:12,440 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 12:03:12,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-28 12:03:13,386 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 12:03:13,520 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 12:03:13,521 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-28 12:03:13,526 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b805afaec/69989c77e5d64c9dad02c06ab18e07d8/FLAG18550a1b5 [2023-01-28 12:03:13,538 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b805afaec/69989c77e5d64c9dad02c06ab18e07d8 [2023-01-28 12:03:13,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 12:03:13,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 12:03:13,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 12:03:13,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 12:03:13,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 12:03:13,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bea762a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13, skipping insertion in model container [2023-01-28 12:03:13,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 12:03:13,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 12:03:13,697 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-01-28 12:03:13,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:03:13,708 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 12:03:13,721 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-01-28 12:03:13,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:03:13,732 INFO L208 MainTranslator]: Completed translation [2023-01-28 12:03:13,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13 WrapperNode [2023-01-28 12:03:13,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 12:03:13,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 12:03:13,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 12:03:13,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 12:03:13,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,773 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-01-28 12:03:13,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 12:03:13,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 12:03:13,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 12:03:13,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 12:03:13,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,799 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 12:03:13,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 12:03:13,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 12:03:13,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 12:03:13,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (1/1) ... [2023-01-28 12:03:13,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:03:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:13,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 12:03:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 12:03:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 12:03:13,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 12:03:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 12:03:13,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 12:03:13,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 12:03:13,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 12:03:13,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 12:03:13,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 12:03:13,870 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 12:03:13,962 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 12:03:13,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 12:03:14,218 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 12:03:14,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 12:03:14,224 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 12:03:14,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:03:14 BoogieIcfgContainer [2023-01-28 12:03:14,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 12:03:14,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 12:03:14,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 12:03:14,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 12:03:14,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:03:13" (1/3) ... [2023-01-28 12:03:14,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334e15f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:03:14, skipping insertion in model container [2023-01-28 12:03:14,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:03:13" (2/3) ... [2023-01-28 12:03:14,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334e15f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:03:14, skipping insertion in model container [2023-01-28 12:03:14,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:03:14" (3/3) ... [2023-01-28 12:03:14,231 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-01-28 12:03:14,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 12:03:14,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 12:03:14,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 12:03:14,339 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 12:03:14,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-01-28 12:03:14,443 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-01-28 12:03:14,443 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:03:14,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-28 12:03:14,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-01-28 12:03:14,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-01-28 12:03:14,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 12:03:14,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-28 12:03:14,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-28 12:03:14,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-01-28 12:03:14,498 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-01-28 12:03:14,498 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:03:14,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-28 12:03:14,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-01-28 12:03:18,362 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-01-28 12:03:18,362 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-01-28 12:03:18,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 12:03:18,376 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;@30cc67fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 12:03:18,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 12:03:18,379 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 12:03:18,379 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:03:18,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:18,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:18,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:18,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-01-28 12:03:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:18,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245390099] [2023-01-28 12:03:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:18,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245390099] [2023-01-28 12:03:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245390099] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:18,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 12:03:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410393723] [2023-01-28 12:03:18,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 12:03:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 12:03:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 12:03:18,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-01-28 12:03:18,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:18,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-01-28 12:03:18,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:18,748 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-01-28 12:03:18,748 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 12:03:18,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-28 12:03:18,750 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-28 12:03:18,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-28 12:03:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 12:03:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 12:03:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-01-28 12:03:18,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415962441314554 [2023-01-28 12:03:18,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-01-28 12:03:18,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-01-28 12:03:18,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:18,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-01-28 12:03:18,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,781 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 443 transitions. [2023-01-28 12:03:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-28 12:03:18,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 12:03:18,785 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-28 12:03:18,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-28 12:03:18,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 12:03:18,789 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-28 12:03:18,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:18,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 12:03:18,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:18,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-01-28 12:03:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902848264] [2023-01-28 12:03:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902848264] [2023-01-28 12:03:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902848264] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:18,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 12:03:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893476809] [2023-01-28 12:03:18,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 12:03:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 12:03:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 12:03:18,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-01-28 12:03:18,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:18,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-01-28 12:03:18,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:18,993 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-01-28 12:03:18,993 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:03:18,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-01-28 12:03:18,995 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-01-28 12:03:18,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-01-28 12:03:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 12:03:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 12:03:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-01-28 12:03:18,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131455399061033 [2023-01-28 12:03:18,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-01-28 12:03:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-01-28 12:03:18,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:18,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-01-28 12:03:18,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:18,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,000 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 440 transitions. [2023-01-28 12:03:19,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-01-28 12:03:19,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 12:03:19,001 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-01-28 12:03:19,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-01-28 12:03:19,002 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-28 12:03:19,002 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-01-28 12:03:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:19,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 12:03:19,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:19,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-01-28 12:03:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:19,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546960556] [2023-01-28 12:03:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:19,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546960556] [2023-01-28 12:03:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546960556] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:03:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89923762] [2023-01-28 12:03:19,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:19,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:03:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:03:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:03:19,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:19,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:19,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:19,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:19,289 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-01-28 12:03:19,289 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 12:03:19,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-01-28 12:03:19,292 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-01-28 12:03:19,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-01-28 12:03:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:03:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:03:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 721 transitions. [2023-01-28 12:03:19,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40619718309859154 [2023-01-28 12:03:19,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 721 transitions. [2023-01-28 12:03:19,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 721 transitions. [2023-01-28 12:03:19,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:19,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 721 transitions. [2023-01-28 12:03:19,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,299 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,299 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 721 transitions. [2023-01-28 12:03:19,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-01-28 12:03:19,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 12:03:19,301 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-01-28 12:03:19,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-28 12:03:19,302 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 12:03:19,304 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-01-28 12:03:19,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:19,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:19,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 12:03:19,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-01-28 12:03:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969789923] [2023-01-28 12:03:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:19,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969789923] [2023-01-28 12:03:19,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969789923] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854832935] [2023-01-28 12:03:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:03:19,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:19,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:19,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 12:03:19,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:03:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 12:03:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:19,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:19,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854832935] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:19,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 12:03:19,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-28 12:03:19,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542159839] [2023-01-28 12:03:19,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:19,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 12:03:19,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 12:03:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 12:03:19,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-28 12:03:19,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:19,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-28 12:03:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:19,708 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-01-28 12:03:19,708 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-01-28 12:03:19,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-01-28 12:03:19,709 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-01-28 12:03:19,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-01-28 12:03:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 12:03:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 12:03:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-01-28 12:03:19,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253521126760563 [2023-01-28 12:03:19,716 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-01-28 12:03:19,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-01-28 12:03:19,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:19,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-01-28 12:03:19,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,720 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 604 transitions. [2023-01-28 12:03:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-01-28 12:03:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 12:03:19,722 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-01-28 12:03:19,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-01-28 12:03:19,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-01-28 12:03:19,722 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-01-28 12:03:19,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:19,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:19,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:19,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:19,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:19,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:19,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:19,929 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-01-28 12:03:19,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:19,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892918929] [2023-01-28 12:03:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:19,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892918929] [2023-01-28 12:03:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892918929] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:03:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757069013] [2023-01-28 12:03:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:20,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:03:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:03:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:03:20,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:20,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:20,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:20,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:20,103 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-01-28 12:03:20,104 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-01-28 12:03:20,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-01-28 12:03:20,105 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-01-28 12:03:20,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-01-28 12:03:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:03:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:03:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-01-28 12:03:20,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042253521126761 [2023-01-28 12:03:20,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-01-28 12:03:20,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-01-28 12:03:20,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:20,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-01-28 12:03:20,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 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) [2023-01-28 12:03:20,112 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 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) [2023-01-28 12:03:20,112 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 861 transitions. [2023-01-28 12:03:20,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-01-28 12:03:20,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 12:03:20,117 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-01-28 12:03:20,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-01-28 12:03:20,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-01-28 12:03:20,120 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-01-28 12:03:20,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:20,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:20,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 12:03:20,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:20,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-01-28 12:03:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:20,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263490148] [2023-01-28 12:03:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263490148] [2023-01-28 12:03:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263490148] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 12:03:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417703915] [2023-01-28 12:03:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 12:03:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 12:03:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 12:03:20,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-28 12:03:20,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:20,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-28 12:03:20,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:20,289 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-01-28 12:03:20,289 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-01-28 12:03:20,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-01-28 12:03:20,290 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-01-28 12:03:20,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-01-28 12:03:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 12:03:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 12:03:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-01-28 12:03:20,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42464788732394365 [2023-01-28 12:03:20,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-01-28 12:03:20,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-01-28 12:03:20,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:20,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-01-28 12:03:20,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,295 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,296 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 603 transitions. [2023-01-28 12:03:20,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-01-28 12:03:20,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 12:03:20,298 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-01-28 12:03:20,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-01-28 12:03:20,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-28 12:03:20,299 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-01-28 12:03:20,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:20,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:20,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 12:03:20,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:20,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-01-28 12:03:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:20,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055313768] [2023-01-28 12:03:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:20,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055313768] [2023-01-28 12:03:20,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055313768] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:20,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:20,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:03:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025883941] [2023-01-28 12:03:20,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:03:20,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:20,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:03:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:03:20,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:20,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:20,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:20,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:20,480 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-01-28 12:03:20,481 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-01-28 12:03:20,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-01-28 12:03:20,482 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-01-28 12:03:20,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-01-28 12:03:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:03:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:03:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 858 transitions. [2023-01-28 12:03:20,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-28 12:03:20,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 858 transitions. [2023-01-28 12:03:20,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 858 transitions. [2023-01-28 12:03:20,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:20,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 858 transitions. [2023-01-28 12:03:20,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 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) [2023-01-28 12:03:20,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 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) [2023-01-28 12:03:20,489 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 858 transitions. [2023-01-28 12:03:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-01-28 12:03:20,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 12:03:20,491 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-01-28 12:03:20,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-01-28 12:03:20,491 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-01-28 12:03:20,492 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-01-28 12:03:20,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:20,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:20,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 12:03:20,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:20,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-01-28 12:03:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463395696] [2023-01-28 12:03:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:20,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463395696] [2023-01-28 12:03:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463395696] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:03:20,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:03:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:03:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447388054] [2023-01-28 12:03:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:03:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:03:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:03:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:03:20,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:20,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:20,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:20,678 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-01-28 12:03:20,678 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-01-28 12:03:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-01-28 12:03:20,680 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-01-28 12:03:20,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-01-28 12:03:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:03:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:03:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 715 transitions. [2023-01-28 12:03:20,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-28 12:03:20,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 715 transitions. [2023-01-28 12:03:20,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 715 transitions. [2023-01-28 12:03:20,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:20,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 715 transitions. [2023-01-28 12:03:20,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,685 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 715 transitions. [2023-01-28 12:03:20,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-01-28 12:03:20,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 12:03:20,687 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-01-28 12:03:20,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-01-28 12:03:20,688 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-01-28 12:03:20,688 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-01-28 12:03:20,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:20,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:20,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 12:03:20,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:20,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-01-28 12:03:20,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:20,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280863541] [2023-01-28 12:03:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:20,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280863541] [2023-01-28 12:03:20,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280863541] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040283842] [2023-01-28 12:03:20,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:03:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:20,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:20,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 12:03:20,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:03:20,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 12:03:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040283842] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:20,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-01-28 12:03:20,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734168120] [2023-01-28 12:03:20,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:03:20,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:20,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:03:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:03:20,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:20,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:20,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:20,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:20,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:21,076 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-01-28 12:03:21,077 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-01-28 12:03:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-01-28 12:03:21,078 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-01-28 12:03:21,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-01-28 12:03:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:03:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:03:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1000 transitions. [2023-01-28 12:03:21,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024144869215292 [2023-01-28 12:03:21,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1000 transitions. [2023-01-28 12:03:21,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1000 transitions. [2023-01-28 12:03:21,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:21,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1000 transitions. [2023-01-28 12:03:21,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.85714285714286) internal successors, (1000), 7 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,085 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,085 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1000 transitions. [2023-01-28 12:03:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-01-28 12:03:21,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 12:03:21,088 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-01-28 12:03:21,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-01-28 12:03:21,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-01-28 12:03:21,088 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-01-28 12:03:21,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:21,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:21,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-01-28 12:03:21,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:21,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-01-28 12:03:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737057037] [2023-01-28 12:03:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737057037] [2023-01-28 12:03:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737057037] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957245759] [2023-01-28 12:03:21,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:03:21,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:21,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:21,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 12:03:21,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:03:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 12:03:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:21,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:21,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957245759] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:21,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:21,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 12:03:21,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544478327] [2023-01-28 12:03:21,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:21,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 12:03:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 12:03:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-28 12:03:21,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:03:21,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:21,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:03:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:21,600 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-28 12:03:21,600 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-01-28 12:03:21,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-01-28 12:03:21,602 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-01-28 12:03:21,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-01-28 12:03:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:03:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:03:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 716 transitions. [2023-01-28 12:03:21,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40338028169014084 [2023-01-28 12:03:21,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 716 transitions. [2023-01-28 12:03:21,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 716 transitions. [2023-01-28 12:03:21,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:21,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 716 transitions. [2023-01-28 12:03:21,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,609 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 716 transitions. [2023-01-28 12:03:21,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-01-28 12:03:21,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 12:03:21,612 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-01-28 12:03:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-01-28 12:03:21,613 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-28 12:03:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-01-28 12:03:21,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:21,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:21,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:21,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 12:03:21,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:21,819 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:21,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-01-28 12:03:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93516699] [2023-01-28 12:03:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:21,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 12:03:22,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93516699] [2023-01-28 12:03:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93516699] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118073757] [2023-01-28 12:03:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:22,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 12:03:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 12:03:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:22,398 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-28 12:03:22,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-01-28 12:03:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:22,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:22,516 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-28 12:03:22,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-28 12:03:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:22,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118073757] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:22,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:22,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-01-28 12:03:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837772735] [2023-01-28 12:03:22,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 12:03:22,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 12:03:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-28 12:03:22,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-28 12:03:22,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:22,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:22,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-28 12:03:22,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:23,570 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-01-28 12:03:23,570 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-01-28 12:03:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-01-28 12:03:23,573 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-01-28 12:03:23,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-01-28 12:03:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 12:03:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 12:03:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2380 transitions. [2023-01-28 12:03:23,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047375160051216 [2023-01-28 12:03:23,578 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2380 transitions. [2023-01-28 12:03:23,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2380 transitions. [2023-01-28 12:03:23,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:23,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2380 transitions. [2023-01-28 12:03:23,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.18181818181819) internal successors, (2380), 22 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:23,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:23,590 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:23,590 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2380 transitions. [2023-01-28 12:03:23,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-01-28 12:03:23,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-01-28 12:03:23,594 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-01-28 12:03:23,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-01-28 12:03:23,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-01-28 12:03:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-01-28 12:03:23,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:23,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:23,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:23,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:23,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:23,801 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:23,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-01-28 12:03:23,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:23,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381702650] [2023-01-28 12:03:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381702650] [2023-01-28 12:03:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381702650] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871763051] [2023-01-28 12:03:24,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:03:24,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:24,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:24,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:24,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 12:03:24,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:03:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 12:03:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:03:24,415 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-28 12:03:24,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-28 12:03:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:24,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:24,527 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-28 12:03:24,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-28 12:03:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871763051] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:24,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:24,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-01-28 12:03:24,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640573762] [2023-01-28 12:03:24,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:24,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 12:03:24,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 12:03:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-28 12:03:24,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-28 12:03:24,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:24,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:24,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-28 12:03:24,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:28,593 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-01-28 12:03:28,593 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-01-28 12:03:28,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-01-28 12:03:28,596 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-01-28 12:03:28,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-01-28 12:03:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 12:03:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 12:03:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2800 transitions. [2023-01-28 12:03:28,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30335861321776814 [2023-01-28 12:03:28,601 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2800 transitions. [2023-01-28 12:03:28,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2800 transitions. [2023-01-28 12:03:28,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:28,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2800 transitions. [2023-01-28 12:03:28,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 107.6923076923077) internal successors, (2800), 26 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:28,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:28,615 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:28,615 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 2800 transitions. [2023-01-28 12:03:28,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-01-28 12:03:28,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-01-28 12:03:28,620 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-01-28 12:03:28,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-01-28 12:03:28,621 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-01-28 12:03:28,621 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-01-28 12:03:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:28,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:28,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:28,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:28,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 12:03:28,826 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:28,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:28,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-01-28 12:03:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956706088] [2023-01-28 12:03:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:28,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956706088] [2023-01-28 12:03:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956706088] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053561426] [2023-01-28 12:03:29,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:03:29,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:29,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:29,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 12:03:29,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:03:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 12:03:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:29,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 12:03:29,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 12:03:29,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 12:03:29,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:03:29,599 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-28 12:03:29,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-28 12:03:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:29,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:29,779 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (v_ArrVal_287 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_287) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse0 0) (= (select .cse1 (+ (* 4 .cse0) c_~f~0.offset)) (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset))))))) is different from false [2023-01-28 12:03:29,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:29,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2023-01-28 12:03:29,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:29,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-01-28 12:03:29,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:29,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-01-28 12:03:30,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:30,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-01-28 12:03:31,052 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 12:03:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-01-28 12:03:31,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053561426] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:31,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:31,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-01-28 12:03:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058191622] [2023-01-28 12:03:31,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:31,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:03:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:03:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2023-01-28 12:03:31,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:03:31,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:31,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:31,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:03:31,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:31,371 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-01-28 12:03:31,371 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-01-28 12:03:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-01-28 12:03:31,373 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-01-28 12:03:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-01-28 12:03:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 12:03:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 12:03:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-01-28 12:03:31,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-01-28 12:03:31,376 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-01-28 12:03:31,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-01-28 12:03:31,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:31,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-01-28 12:03:31,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:31,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:31,380 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:31,380 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-01-28 12:03:31,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-01-28 12:03:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-01-28 12:03:31,385 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-01-28 12:03:31,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-01-28 12:03:31,385 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-28 12:03:31,385 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-01-28 12:03:31,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:31,386 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:31,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:31,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:31,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:31,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-01-28 12:03:31,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:31,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049483425] [2023-01-28 12:03:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:31,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049483425] [2023-01-28 12:03:33,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049483425] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753587855] [2023-01-28 12:03:33,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:03:33,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:33,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:33,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 12:03:33,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:03:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 12:03:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:33,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:33,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:03:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:33,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:33,681 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:03:33,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 12:03:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 12:03:33,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753587855] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:33,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 12:03:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151167612] [2023-01-28 12:03:33,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:03:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:03:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:03:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:03:33,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:33,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:33,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:03:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:34,665 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-01-28 12:03:34,665 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-01-28 12:03:34,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-01-28 12:03:34,670 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-01-28 12:03:34,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-01-28 12:03:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 12:03:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 12:03:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2134 transitions. [2023-01-28 12:03:34,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31638250555967384 [2023-01-28 12:03:34,675 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2134 transitions. [2023-01-28 12:03:34,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2134 transitions. [2023-01-28 12:03:34,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:34,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2134 transitions. [2023-01-28 12:03:34,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 112.3157894736842) internal successors, (2134), 19 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:34,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:34,683 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:34,683 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2134 transitions. [2023-01-28 12:03:34,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-01-28 12:03:34,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-28 12:03:34,696 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-01-28 12:03:34,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-01-28 12:03:34,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-28 12:03:34,697 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-01-28 12:03:34,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:34,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:34,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:34,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 12:03:34,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:34,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:34,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-01-28 12:03:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152775836] [2023-01-28 12:03:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:36,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152775836] [2023-01-28 12:03:36,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152775836] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615272032] [2023-01-28 12:03:36,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:03:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:36,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:36,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 12:03:36,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 12:03:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 12:03:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:36,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:03:36,260 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-01-28 12:03:36,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-01-28 12:03:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:36,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:36,448 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:03:36,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 12:03:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:03:36,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615272032] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:36,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:36,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-01-28 12:03:36,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712280268] [2023-01-28 12:03:36,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:36,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 12:03:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 12:03:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-01-28 12:03:36,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:03:36,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:36,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:36,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:03:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:37,336 INFO L130 PetriNetUnfolder]: 586/1045 cut-off events. [2023-01-28 12:03:37,336 INFO L131 PetriNetUnfolder]: For 4506/4542 co-relation queries the response was YES. [2023-01-28 12:03:37,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 1045 events. 586/1045 cut-off events. For 4506/4542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5045 event pairs, 64 based on Foata normal form. 30/1064 useless extension candidates. Maximal degree in co-relation 4905. Up to 610 conditions per place. [2023-01-28 12:03:37,343 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-01-28 12:03:37,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-01-28 12:03:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 12:03:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 12:03:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2236 transitions. [2023-01-28 12:03:37,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149295774647887 [2023-01-28 12:03:37,347 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2236 transitions. [2023-01-28 12:03:37,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2236 transitions. [2023-01-28 12:03:37,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:37,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2236 transitions. [2023-01-28 12:03:37,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:37,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:37,356 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:37,356 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2236 transitions. [2023-01-28 12:03:37,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-01-28 12:03:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-01-28 12:03:37,366 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-01-28 12:03:37,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-01-28 12:03:37,366 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-01-28 12:03:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-01-28 12:03:37,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:37,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:37,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:37,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:37,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 12:03:37,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:37,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -182781255, now seen corresponding path program 6 times [2023-01-28 12:03:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824112047] [2023-01-28 12:03:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824112047] [2023-01-28 12:03:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824112047] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000697810] [2023-01-28 12:03:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:03:38,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:38,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 12:03:38,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:03:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:38,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 12:03:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:38,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:38,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:03:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:38,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:38,967 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:03:38,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 12:03:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 12:03:39,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000697810] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:39,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:39,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 12:03:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009428803] [2023-01-28 12:03:39,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:39,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:03:39,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:03:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:03:39,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:03:39,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:39,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:39,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:03:39,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:39,784 INFO L130 PetriNetUnfolder]: 758/1356 cut-off events. [2023-01-28 12:03:39,784 INFO L131 PetriNetUnfolder]: For 5979/6017 co-relation queries the response was YES. [2023-01-28 12:03:39,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1356 events. 758/1356 cut-off events. For 5979/6017 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6998 event pairs, 117 based on Foata normal form. 33/1378 useless extension candidates. Maximal degree in co-relation 6966. Up to 938 conditions per place. [2023-01-28 12:03:39,793 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-01-28 12:03:39,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-01-28 12:03:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:03:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:03:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1894 transitions. [2023-01-28 12:03:39,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31383595691797844 [2023-01-28 12:03:39,796 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1894 transitions. [2023-01-28 12:03:39,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1894 transitions. [2023-01-28 12:03:39,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:39,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1894 transitions. [2023-01-28 12:03:39,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 111.41176470588235) internal successors, (1894), 17 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:39,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:39,803 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:39,803 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 1894 transitions. [2023-01-28 12:03:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-01-28 12:03:39,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-01-28 12:03:39,820 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-01-28 12:03:39,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-01-28 12:03:39,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-01-28 12:03:39,820 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-01-28 12:03:39,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:39,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:39,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:39,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 12:03:40,025 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:40,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2064264659, now seen corresponding path program 7 times [2023-01-28 12:03:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605661228] [2023-01-28 12:03:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:40,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:40,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605661228] [2023-01-28 12:03:40,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605661228] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:40,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847232963] [2023-01-28 12:03:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:03:40,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:40,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:40,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 12:03:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 12:03:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:40,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:40,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:03:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:40,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:41,137 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 12:03:41,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 12:03:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:03:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847232963] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:41,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 12:03:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24906953] [2023-01-28 12:03:41,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:03:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:03:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:03:41,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 355 [2023-01-28 12:03:41,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:41,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:41,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 355 [2023-01-28 12:03:41,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:41,916 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-01-28 12:03:41,917 INFO L131 PetriNetUnfolder]: For 8651/8693 co-relation queries the response was YES. [2023-01-28 12:03:41,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8651/8693 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10420 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-01-28 12:03:41,930 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-01-28 12:03:41,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-01-28 12:03:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 12:03:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 12:03:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2372 transitions. [2023-01-28 12:03:41,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3340845070422535 [2023-01-28 12:03:41,932 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2372 transitions. [2023-01-28 12:03:41,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2372 transitions. [2023-01-28 12:03:41,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:41,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2372 transitions. [2023-01-28 12:03:41,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 118.6) internal successors, (2372), 20 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:41,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:41,939 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:41,939 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2372 transitions. [2023-01-28 12:03:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-01-28 12:03:41,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-01-28 12:03:41,965 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-01-28 12:03:41,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-01-28 12:03:41,965 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-01-28 12:03:41,965 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-01-28 12:03:41,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:41,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:41,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:41,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:42,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 12:03:42,171 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:42,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-01-28 12:03:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:42,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631256476] [2023-01-28 12:03:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:42,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631256476] [2023-01-28 12:03:42,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631256476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156008506] [2023-01-28 12:03:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:03:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:42,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:42,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 12:03:43,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:03:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:43,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 12:03:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:03:43,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 12:03:43,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:03:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:03:43,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:43,270 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4)))))) is different from false [2023-01-28 12:03:43,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:43,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-28 12:03:43,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:43,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-28 12:03:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:03:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156008506] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:44,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 12:03:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715609158] [2023-01-28 12:03:44,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:44,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 12:03:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 12:03:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-01-28 12:03:44,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-01-28 12:03:44,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:44,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:44,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-01-28 12:03:44,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:03:45,168 INFO L130 PetriNetUnfolder]: 1315/2368 cut-off events. [2023-01-28 12:03:45,168 INFO L131 PetriNetUnfolder]: For 12875/12917 co-relation queries the response was YES. [2023-01-28 12:03:45,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13103 conditions, 2368 events. 1315/2368 cut-off events. For 12875/12917 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13799 event pairs, 202 based on Foata normal form. 36/2393 useless extension candidates. Maximal degree in co-relation 13044. Up to 1492 conditions per place. [2023-01-28 12:03:45,185 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 188 selfloop transitions, 138 changer transitions 2/334 dead transitions. [2023-01-28 12:03:45,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 334 transitions, 4559 flow [2023-01-28 12:03:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 12:03:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 12:03:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2522 transitions. [2023-01-28 12:03:45,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229193341869398 [2023-01-28 12:03:45,188 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2522 transitions. [2023-01-28 12:03:45,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2522 transitions. [2023-01-28 12:03:45,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:03:45,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2522 transitions. [2023-01-28 12:03:45,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.63636363636364) internal successors, (2522), 22 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:45,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:45,195 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:45,195 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 22 states and 2522 transitions. [2023-01-28 12:03:45,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 334 transitions, 4559 flow [2023-01-28 12:03:45,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 334 transitions, 4319 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-01-28 12:03:45,233 INFO L231 Difference]: Finished difference. Result has 148 places, 273 transitions, 3840 flow [2023-01-28 12:03:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3840, PETRI_PLACES=148, PETRI_TRANSITIONS=273} [2023-01-28 12:03:45,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-01-28 12:03:45,234 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 273 transitions, 3840 flow [2023-01-28 12:03:45,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:03:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:45,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 12:03:45,439 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:45,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-01-28 12:03:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:45,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861614255] [2023-01-28 12:03:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861614255] [2023-01-28 12:03:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861614255] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323106941] [2023-01-28 12:03:46,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:03:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:46,468 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:46,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 12:03:46,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:03:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 12:03:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:46,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 12:03:46,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 12:03:46,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:03:46,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 12:03:46,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:46,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-01-28 12:03:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:03:46,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:47,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:47,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 215 [2023-01-28 12:03:47,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:47,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-01-28 12:03:47,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:47,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-01-28 12:03:47,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:03:47,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-01-28 12:06:17,106 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 12:06:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:06:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323106941] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:06:17,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:06:17,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 12:06:17,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911008989] [2023-01-28 12:06:17,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:06:17,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 12:06:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:06:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 12:06:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=595, Unknown=2, NotChecked=0, Total=702 [2023-01-28 12:06:17,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:06:17,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 273 transitions, 3840 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:17,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:06:17,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:06:17,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:06:19,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:06:27,898 WARN L222 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 12:06:30,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:06:32,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:06:38,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:06:39,633 INFO L130 PetriNetUnfolder]: 1850/3344 cut-off events. [2023-01-28 12:06:39,633 INFO L131 PetriNetUnfolder]: For 24805/24917 co-relation queries the response was YES. [2023-01-28 12:06:39,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20628 conditions, 3344 events. 1850/3344 cut-off events. For 24805/24917 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21133 event pairs, 321 based on Foata normal form. 106/3437 useless extension candidates. Maximal degree in co-relation 20110. Up to 1877 conditions per place. [2023-01-28 12:06:39,656 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 238 selfloop transitions, 217 changer transitions 2/463 dead transitions. [2023-01-28 12:06:39,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 463 transitions, 6805 flow [2023-01-28 12:06:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 12:06:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 12:06:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3028 transitions. [2023-01-28 12:06:39,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31591027647365677 [2023-01-28 12:06:39,659 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3028 transitions. [2023-01-28 12:06:39,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3028 transitions. [2023-01-28 12:06:39,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:06:39,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3028 transitions. [2023-01-28 12:06:39,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 112.14814814814815) internal successors, (3028), 27 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:39,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:39,667 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:39,667 INFO L175 Difference]: Start difference. First operand has 148 places, 273 transitions, 3840 flow. Second operand 27 states and 3028 transitions. [2023-01-28 12:06:39,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 463 transitions, 6805 flow [2023-01-28 12:06:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 463 transitions, 6451 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-01-28 12:06:39,734 INFO L231 Difference]: Finished difference. Result has 173 places, 377 transitions, 5818 flow [2023-01-28 12:06:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5818, PETRI_PLACES=173, PETRI_TRANSITIONS=377} [2023-01-28 12:06:39,734 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2023-01-28 12:06:39,734 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 377 transitions, 5818 flow [2023-01-28 12:06:39,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:39,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:06:39,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:06:39,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 12:06:39,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:06:39,939 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:06:39,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:06:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1813313051, now seen corresponding path program 10 times [2023-01-28 12:06:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:06:39,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269191484] [2023-01-28 12:06:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:06:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:06:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:06:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:06:40,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:06:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269191484] [2023-01-28 12:06:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269191484] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:06:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801967286] [2023-01-28 12:06:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:06:40,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:06:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:06:40,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:06:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 12:06:41,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:06:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:06:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 12:06:41,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:06:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:06:41,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 12:06:41,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:06:41,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:06:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:06:41,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:06:41,322 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_531 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_531) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-01-28 12:06:41,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:06:41,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-28 12:06:41,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:06:41,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-28 12:06:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:06:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801967286] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:06:42,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:06:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 12:06:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933601254] [2023-01-28 12:06:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:06:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 12:06:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:06:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 12:06:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-01-28 12:06:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:06:42,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 377 transitions, 5818 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:42,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:06:42,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:06:42,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:06:45,389 INFO L130 PetriNetUnfolder]: 2111/3812 cut-off events. [2023-01-28 12:06:45,389 INFO L131 PetriNetUnfolder]: For 31923/32013 co-relation queries the response was YES. [2023-01-28 12:06:45,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24816 conditions, 3812 events. 2111/3812 cut-off events. For 31923/32013 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24830 event pairs, 353 based on Foata normal form. 86/3885 useless extension candidates. Maximal degree in co-relation 24277. Up to 2750 conditions per place. [2023-01-28 12:06:45,418 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 305 selfloop transitions, 160 changer transitions 2/473 dead transitions. [2023-01-28 12:06:45,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 473 transitions, 7906 flow [2023-01-28 12:06:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 12:06:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 12:06:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2340 transitions. [2023-01-28 12:06:45,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31388329979879276 [2023-01-28 12:06:45,421 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2340 transitions. [2023-01-28 12:06:45,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2340 transitions. [2023-01-28 12:06:45,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:06:45,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2340 transitions. [2023-01-28 12:06:45,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.42857142857143) internal successors, (2340), 21 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:45,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:45,427 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:45,427 INFO L175 Difference]: Start difference. First operand has 173 places, 377 transitions, 5818 flow. Second operand 21 states and 2340 transitions. [2023-01-28 12:06:45,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 473 transitions, 7906 flow [2023-01-28 12:06:45,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 473 transitions, 7463 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-01-28 12:06:45,548 INFO L231 Difference]: Finished difference. Result has 189 places, 419 transitions, 6754 flow [2023-01-28 12:06:45,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6754, PETRI_PLACES=189, PETRI_TRANSITIONS=419} [2023-01-28 12:06:45,548 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2023-01-28 12:06:45,549 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 419 transitions, 6754 flow [2023-01-28 12:06:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:45,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:06:45,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:06:45,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 12:06:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-01-28 12:06:45,754 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:06:45,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:06:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash 190166667, now seen corresponding path program 11 times [2023-01-28 12:06:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:06:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440420785] [2023-01-28 12:06:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:06:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:06:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:06:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:06:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:06:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440420785] [2023-01-28 12:06:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440420785] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:06:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593470275] [2023-01-28 12:06:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:06:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:06:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:06:46,559 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:06:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 12:06:46,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 12:06:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:06:46,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 12:06:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:06:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:06:46,836 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 26 treesize of output 24 [2023-01-28 12:06:46,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 12:06:46,919 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2023-01-28 12:06:46,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2023-01-28 12:06:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:06:46,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:06:47,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:06:47,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-01-28 12:06:47,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:06:47,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2023-01-28 12:06:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:06:47,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593470275] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:06:47,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:06:47,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 12:06:47,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053175997] [2023-01-28 12:06:47,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:06:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 12:06:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:06:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 12:06:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=484, Unknown=5, NotChecked=0, Total=552 [2023-01-28 12:06:47,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:06:47,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 419 transitions, 6754 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:06:47,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:06:47,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:06:47,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:06:56,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:06:58,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:07:00,005 INFO L130 PetriNetUnfolder]: 2767/5002 cut-off events. [2023-01-28 12:07:00,005 INFO L131 PetriNetUnfolder]: For 52324/52454 co-relation queries the response was YES. [2023-01-28 12:07:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35379 conditions, 5002 events. 2767/5002 cut-off events. For 52324/52454 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34147 event pairs, 489 based on Foata normal form. 125/5114 useless extension candidates. Maximal degree in co-relation 34423. Up to 2758 conditions per place. [2023-01-28 12:07:00,050 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 307 selfloop transitions, 292 changer transitions 3/608 dead transitions. [2023-01-28 12:07:00,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 608 transitions, 10787 flow [2023-01-28 12:07:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:07:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:07:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2588 transitions. [2023-01-28 12:07:00,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31696264543784447 [2023-01-28 12:07:00,053 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2588 transitions. [2023-01-28 12:07:00,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2588 transitions. [2023-01-28 12:07:00,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2588 transitions. [2023-01-28 12:07:00,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 112.52173913043478) internal successors, (2588), 23 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:00,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:00,059 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:00,059 INFO L175 Difference]: Start difference. First operand has 189 places, 419 transitions, 6754 flow. Second operand 23 states and 2588 transitions. [2023-01-28 12:07:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 608 transitions, 10787 flow [2023-01-28 12:07:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 608 transitions, 10448 flow, removed 127 selfloop flow, removed 10 redundant places. [2023-01-28 12:07:00,299 INFO L231 Difference]: Finished difference. Result has 208 places, 529 transitions, 9664 flow [2023-01-28 12:07:00,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6461, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9664, PETRI_PLACES=208, PETRI_TRANSITIONS=529} [2023-01-28 12:07:00,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2023-01-28 12:07:00,299 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 529 transitions, 9664 flow [2023-01-28 12:07:00,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:00,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:00,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:00,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 12:07:00,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:00,505 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:00,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1743390373, now seen corresponding path program 12 times [2023-01-28 12:07:00,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:00,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907651303] [2023-01-28 12:07:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:07:01,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907651303] [2023-01-28 12:07:01,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907651303] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831563674] [2023-01-28 12:07:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:07:01,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:01,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:01,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 12:07:01,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:07:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:07:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 12:07:01,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:07:01,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-28 12:07:02,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:07:02,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 12:07:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:07:02,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:02,073 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-01-28 12:07:02,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:07:02,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-01-28 12:07:02,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:07:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-01-28 12:07:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831563674] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:02,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 12:07:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134396422] [2023-01-28 12:07:02,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 12:07:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 12:07:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=4, NotChecked=42, Total=552 [2023-01-28 12:07:02,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 12:07:02,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 529 transitions, 9664 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:02,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:02,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 12:07:02,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:07:03,482 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)))) (and (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) (= c_~x2~0 .cse1))) is different from false [2023-01-28 12:07:03,613 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-01-28 12:07:04,687 INFO L130 PetriNetUnfolder]: 3119/5586 cut-off events. [2023-01-28 12:07:04,687 INFO L131 PetriNetUnfolder]: For 76462/76573 co-relation queries the response was YES. [2023-01-28 12:07:04,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44063 conditions, 5586 events. 3119/5586 cut-off events. For 76462/76573 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38740 event pairs, 564 based on Foata normal form. 104/5675 useless extension candidates. Maximal degree in co-relation 42940. Up to 4086 conditions per place. [2023-01-28 12:07:04,731 INFO L137 encePairwiseOnDemand]: 344/355 looper letters, 392 selfloop transitions, 269 changer transitions 2/669 dead transitions. [2023-01-28 12:07:04,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 669 transitions, 13260 flow [2023-01-28 12:07:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 12:07:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 12:07:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2237 transitions. [2023-01-28 12:07:04,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150704225352113 [2023-01-28 12:07:04,734 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2237 transitions. [2023-01-28 12:07:04,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2237 transitions. [2023-01-28 12:07:04,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:04,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2237 transitions. [2023-01-28 12:07:04,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.85) internal successors, (2237), 20 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:04,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:04,740 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:04,740 INFO L175 Difference]: Start difference. First operand has 208 places, 529 transitions, 9664 flow. Second operand 20 states and 2237 transitions. [2023-01-28 12:07:04,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 669 transitions, 13260 flow [2023-01-28 12:07:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 669 transitions, 12387 flow, removed 390 selfloop flow, removed 9 redundant places. [2023-01-28 12:07:05,000 INFO L231 Difference]: Finished difference. Result has 225 places, 615 transitions, 11593 flow [2023-01-28 12:07:05,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11593, PETRI_PLACES=225, PETRI_TRANSITIONS=615} [2023-01-28 12:07:05,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-01-28 12:07:05,001 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 615 transitions, 11593 flow [2023-01-28 12:07:05,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:05,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:05,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:05,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-28 12:07:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:05,202 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:05,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 455080388, now seen corresponding path program 13 times [2023-01-28 12:07:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144727254] [2023-01-28 12:07:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:05,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144727254] [2023-01-28 12:07:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144727254] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631432621] [2023-01-28 12:07:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:07:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:05,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 12:07:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:07:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:05,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631432621] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:05,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:05,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 12:07:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758582481] [2023-01-28 12:07:05,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:05,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 12:07:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:05,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 12:07:05,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-01-28 12:07:05,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:07:05,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 615 transitions, 11593 flow. Second operand has 17 states, 17 states have (on average 137.94117647058823) internal successors, (2345), 17 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:05,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:05,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:07:05,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:07:07,533 INFO L130 PetriNetUnfolder]: 3892/7231 cut-off events. [2023-01-28 12:07:07,533 INFO L131 PetriNetUnfolder]: For 118017/118017 co-relation queries the response was YES. [2023-01-28 12:07:07,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61977 conditions, 7231 events. 3892/7231 cut-off events. For 118017/118017 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 55780 event pairs, 421 based on Foata normal form. 126/7357 useless extension candidates. Maximal degree in co-relation 60767. Up to 3879 conditions per place. [2023-01-28 12:07:07,586 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 704 selfloop transitions, 357 changer transitions 43/1104 dead transitions. [2023-01-28 12:07:07,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1104 transitions, 23019 flow [2023-01-28 12:07:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 12:07:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 12:07:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2267 transitions. [2023-01-28 12:07:07,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39911971830985915 [2023-01-28 12:07:07,588 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2267 transitions. [2023-01-28 12:07:07,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2267 transitions. [2023-01-28 12:07:07,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:07,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2267 transitions. [2023-01-28 12:07:07,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 141.6875) internal successors, (2267), 16 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:07,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:07,593 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:07,593 INFO L175 Difference]: Start difference. First operand has 225 places, 615 transitions, 11593 flow. Second operand 16 states and 2267 transitions. [2023-01-28 12:07:07,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1104 transitions, 23019 flow [2023-01-28 12:07:07,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1104 transitions, 22000 flow, removed 409 selfloop flow, removed 9 redundant places. [2023-01-28 12:07:07,939 INFO L231 Difference]: Finished difference. Result has 237 places, 828 transitions, 16373 flow [2023-01-28 12:07:07,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=10937, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=16373, PETRI_PLACES=237, PETRI_TRANSITIONS=828} [2023-01-28 12:07:07,940 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-01-28 12:07:07,940 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 828 transitions, 16373 flow [2023-01-28 12:07:07,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.94117647058823) internal successors, (2345), 17 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:07,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:07,940 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:07,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 12:07:08,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 12:07:08,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:08,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 141382429, now seen corresponding path program 14 times [2023-01-28 12:07:08,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112533291] [2023-01-28 12:07:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112533291] [2023-01-28 12:07:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112533291] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683873800] [2023-01-28 12:07:08,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:07:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:08,289 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 12:07:08,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:07:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:07:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:07:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:08,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683873800] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:08,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:08,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 12:07:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979186163] [2023-01-28 12:07:08,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 12:07:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:08,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 12:07:08,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-01-28 12:07:08,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:07:08,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 828 transitions, 16373 flow. Second operand has 16 states, 16 states have (on average 138.1875) internal successors, (2211), 16 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:08,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:08,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:07:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:07:14,608 INFO L130 PetriNetUnfolder]: 7318/13460 cut-off events. [2023-01-28 12:07:14,608 INFO L131 PetriNetUnfolder]: For 248487/248487 co-relation queries the response was YES. [2023-01-28 12:07:14,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124303 conditions, 13460 events. 7318/13460 cut-off events. For 248487/248487 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 109641 event pairs, 883 based on Foata normal form. 159/13619 useless extension candidates. Maximal degree in co-relation 122883. Up to 7409 conditions per place. [2023-01-28 12:07:14,742 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 909 selfloop transitions, 629 changer transitions 0/1538 dead transitions. [2023-01-28 12:07:14,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1538 transitions, 32920 flow [2023-01-28 12:07:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 12:07:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 12:07:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2592 transitions. [2023-01-28 12:07:14,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4056338028169014 [2023-01-28 12:07:14,745 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2592 transitions. [2023-01-28 12:07:14,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2592 transitions. [2023-01-28 12:07:14,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:14,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2592 transitions. [2023-01-28 12:07:14,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:14,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:14,751 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:14,751 INFO L175 Difference]: Start difference. First operand has 237 places, 828 transitions, 16373 flow. Second operand 18 states and 2592 transitions. [2023-01-28 12:07:14,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1538 transitions, 32920 flow [2023-01-28 12:07:15,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1538 transitions, 31669 flow, removed 527 selfloop flow, removed 4 redundant places. [2023-01-28 12:07:15,727 INFO L231 Difference]: Finished difference. Result has 258 places, 1134 transitions, 24502 flow [2023-01-28 12:07:15,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=15180, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24502, PETRI_PLACES=258, PETRI_TRANSITIONS=1134} [2023-01-28 12:07:15,728 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-01-28 12:07:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1134 transitions, 24502 flow [2023-01-28 12:07:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.1875) internal successors, (2211), 16 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:15,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:15,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 12:07:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:15,929 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:15,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 15 times [2023-01-28 12:07:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827796712] [2023-01-28 12:07:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:16,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:16,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827796712] [2023-01-28 12:07:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827796712] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631252019] [2023-01-28 12:07:16,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:07:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:16,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:16,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 12:07:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:07:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:07:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:07:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:16,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:16,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631252019] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:16,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 12:07:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664252591] [2023-01-28 12:07:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:16,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:07:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:07:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:07:16,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:07:16,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1134 transitions, 24502 flow. Second operand has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:16,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:16,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:07:16,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:07:18,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 12:07:27,261 INFO L130 PetriNetUnfolder]: 8047/16450 cut-off events. [2023-01-28 12:07:27,261 INFO L131 PetriNetUnfolder]: For 399881/399881 co-relation queries the response was YES. [2023-01-28 12:07:27,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161872 conditions, 16450 events. 8047/16450 cut-off events. For 399881/399881 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 157309 event pairs, 1213 based on Foata normal form. 60/16510 useless extension candidates. Maximal degree in co-relation 160057. Up to 9261 conditions per place. [2023-01-28 12:07:27,417 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1191 selfloop transitions, 809 changer transitions 11/2011 dead transitions. [2023-01-28 12:07:27,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 2011 transitions, 49284 flow [2023-01-28 12:07:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 12:07:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 12:07:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4951 transitions. [2023-01-28 12:07:27,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984708249496982 [2023-01-28 12:07:27,422 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4951 transitions. [2023-01-28 12:07:27,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4951 transitions. [2023-01-28 12:07:27,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:27,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4951 transitions. [2023-01-28 12:07:27,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 141.45714285714286) internal successors, (4951), 35 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:27,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:27,432 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:27,432 INFO L175 Difference]: Start difference. First operand has 258 places, 1134 transitions, 24502 flow. Second operand 35 states and 4951 transitions. [2023-01-28 12:07:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 2011 transitions, 49284 flow [2023-01-28 12:07:29,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2011 transitions, 47663 flow, removed 791 selfloop flow, removed 2 redundant places. [2023-01-28 12:07:29,450 INFO L231 Difference]: Finished difference. Result has 304 places, 1573 transitions, 37886 flow [2023-01-28 12:07:29,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=23359, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=37886, PETRI_PLACES=304, PETRI_TRANSITIONS=1573} [2023-01-28 12:07:29,451 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-01-28 12:07:29,452 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1573 transitions, 37886 flow [2023-01-28 12:07:29,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:29,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:29,452 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:29,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 12:07:29,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:29,653 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:29,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2012161717, now seen corresponding path program 16 times [2023-01-28 12:07:29,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:29,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70426698] [2023-01-28 12:07:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70426698] [2023-01-28 12:07:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70426698] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638271593] [2023-01-28 12:07:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:07:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:29,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:29,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 12:07:29,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:07:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:07:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:07:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:30,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638271593] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:30,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:30,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 12:07:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800163256] [2023-01-28 12:07:30,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:07:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:07:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:07:30,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:07:30,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1573 transitions, 37886 flow. Second operand has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 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) [2023-01-28 12:07:30,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:30,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:07:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:07:39,420 INFO L130 PetriNetUnfolder]: 8470/17088 cut-off events. [2023-01-28 12:07:39,421 INFO L131 PetriNetUnfolder]: For 484910/484910 co-relation queries the response was YES. [2023-01-28 12:07:39,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175987 conditions, 17088 events. 8470/17088 cut-off events. For 484910/484910 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 159919 event pairs, 1574 based on Foata normal form. 159/17247 useless extension candidates. Maximal degree in co-relation 175675. Up to 9379 conditions per place. [2023-01-28 12:07:39,605 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1088 selfloop transitions, 1021 changer transitions 0/2109 dead transitions. [2023-01-28 12:07:39,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 2109 transitions, 51842 flow [2023-01-28 12:07:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 12:07:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 12:07:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3299 transitions. [2023-01-28 12:07:39,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404164115125535 [2023-01-28 12:07:39,609 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3299 transitions. [2023-01-28 12:07:39,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3299 transitions. [2023-01-28 12:07:39,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:07:39,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3299 transitions. [2023-01-28 12:07:39,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.43478260869566) internal successors, (3299), 23 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:39,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:39,616 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:39,616 INFO L175 Difference]: Start difference. First operand has 304 places, 1573 transitions, 37886 flow. Second operand 23 states and 3299 transitions. [2023-01-28 12:07:39,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 2109 transitions, 51842 flow [2023-01-28 12:07:42,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 2109 transitions, 49470 flow, removed 693 selfloop flow, removed 13 redundant places. [2023-01-28 12:07:43,024 INFO L231 Difference]: Finished difference. Result has 320 places, 1680 transitions, 40406 flow [2023-01-28 12:07:43,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=35455, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=912, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40406, PETRI_PLACES=320, PETRI_TRANSITIONS=1680} [2023-01-28 12:07:43,026 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-01-28 12:07:43,026 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1680 transitions, 40406 flow [2023-01-28 12:07:43,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 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) [2023-01-28 12:07:43,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:07:43,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:07:43,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 12:07:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:43,231 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:07:43,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:07:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash 271090373, now seen corresponding path program 17 times [2023-01-28 12:07:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:07:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146674966] [2023-01-28 12:07:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:07:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:07:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:07:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:07:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146674966] [2023-01-28 12:07:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146674966] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:07:43,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799454225] [2023-01-28 12:07:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:07:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:07:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:07:43,369 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:07:43,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 12:07:43,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:07:43,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:07:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 12:07:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:07:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:56,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:07:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:07:56,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799454225] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:07:56,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:07:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-01-28 12:07:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317991547] [2023-01-28 12:07:56,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:07:56,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 12:07:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:07:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 12:07:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-01-28 12:07:56,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:07:56,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1680 transitions, 40406 flow. Second operand has 21 states, 21 states have (on average 137.66666666666666) internal successors, (2891), 21 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:07:56,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:07:56,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:07:56,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:09,567 INFO L130 PetriNetUnfolder]: 9663/19247 cut-off events. [2023-01-28 12:08:09,567 INFO L131 PetriNetUnfolder]: For 673039/673039 co-relation queries the response was YES. [2023-01-28 12:08:09,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205196 conditions, 19247 events. 9663/19247 cut-off events. For 673039/673039 co-relation queries the response was YES. Maximal size of possible extension queue 1237. Compared 183448 event pairs, 156 based on Foata normal form. 87/19334 useless extension candidates. Maximal degree in co-relation 204266. Up to 10631 conditions per place. [2023-01-28 12:08:09,815 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1324 selfloop transitions, 802 changer transitions 2/2128 dead transitions. [2023-01-28 12:08:09,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2128 transitions, 53612 flow [2023-01-28 12:08:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 12:08:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 12:08:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2689 transitions. [2023-01-28 12:08:09,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39866567828020755 [2023-01-28 12:08:09,818 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2689 transitions. [2023-01-28 12:08:09,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2689 transitions. [2023-01-28 12:08:09,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:09,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2689 transitions. [2023-01-28 12:08:09,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 141.52631578947367) internal successors, (2689), 19 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:09,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:09,825 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:09,825 INFO L175 Difference]: Start difference. First operand has 320 places, 1680 transitions, 40406 flow. Second operand 19 states and 2689 transitions. [2023-01-28 12:08:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2128 transitions, 53612 flow [2023-01-28 12:08:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 2128 transitions, 52081 flow, removed 616 selfloop flow, removed 5 redundant places. [2023-01-28 12:08:14,245 INFO L231 Difference]: Finished difference. Result has 338 places, 2003 transitions, 48417 flow [2023-01-28 12:08:14,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=39412, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=48417, PETRI_PLACES=338, PETRI_TRANSITIONS=2003} [2023-01-28 12:08:14,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2023-01-28 12:08:14,247 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 2003 transitions, 48417 flow [2023-01-28 12:08:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.66666666666666) internal successors, (2891), 21 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:14,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:14,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:14,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 12:08:14,453 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:14,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 18 times [2023-01-28 12:08:14,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:14,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917486392] [2023-01-28 12:08:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917486392] [2023-01-28 12:08:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917486392] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409558918] [2023-01-28 12:08:14,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:08:14,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:14,609 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:08:14,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 12:08:14,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:08:14,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:08:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:08:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:14,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:15,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409558918] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:15,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:15,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 12:08:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986198568] [2023-01-28 12:08:15,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:15,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:08:15,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:08:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:08:15,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:08:15,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 2003 transitions, 48417 flow. Second operand has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:15,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:15,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:08:15,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:28,724 INFO L130 PetriNetUnfolder]: 9694/19298 cut-off events. [2023-01-28 12:08:28,724 INFO L131 PetriNetUnfolder]: For 821506/821506 co-relation queries the response was YES. [2023-01-28 12:08:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220063 conditions, 19298 events. 9694/19298 cut-off events. For 821506/821506 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 181850 event pairs, 3610 based on Foata normal form. 23/19321 useless extension candidates. Maximal degree in co-relation 219398. Up to 15963 conditions per place. [2023-01-28 12:08:28,941 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1593 selfloop transitions, 557 changer transitions 1/2151 dead transitions. [2023-01-28 12:08:28,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 2151 transitions, 55244 flow [2023-01-28 12:08:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 12:08:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 12:08:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3957 transitions. [2023-01-28 12:08:28,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39808853118712273 [2023-01-28 12:08:28,944 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3957 transitions. [2023-01-28 12:08:28,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3957 transitions. [2023-01-28 12:08:28,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:08:28,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3957 transitions. [2023-01-28 12:08:28,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 141.32142857142858) internal successors, (3957), 28 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:28,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:28,952 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:28,952 INFO L175 Difference]: Start difference. First operand has 338 places, 2003 transitions, 48417 flow. Second operand 28 states and 3957 transitions. [2023-01-28 12:08:28,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 2151 transitions, 55244 flow [2023-01-28 12:08:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 2151 transitions, 53145 flow, removed 641 selfloop flow, removed 14 redundant places. [2023-01-28 12:08:37,363 INFO L231 Difference]: Finished difference. Result has 361 places, 2024 transitions, 48132 flow [2023-01-28 12:08:37,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46265, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=48132, PETRI_PLACES=361, PETRI_TRANSITIONS=2024} [2023-01-28 12:08:37,365 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 340 predicate places. [2023-01-28 12:08:37,365 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 2024 transitions, 48132 flow [2023-01-28 12:08:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:37,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:08:37,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:08:37,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 12:08:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 12:08:37,571 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:08:37,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:08:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1285537098, now seen corresponding path program 19 times [2023-01-28 12:08:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:08:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981522011] [2023-01-28 12:08:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:08:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:08:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:37,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:08:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981522011] [2023-01-28 12:08:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981522011] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:08:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433109079] [2023-01-28 12:08:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:08:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:08:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:08:37,730 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:08:37,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 12:08:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:08:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:08:37,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:08:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:38,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:08:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:08:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433109079] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:08:38,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:08:38,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 12:08:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722806804] [2023-01-28 12:08:38,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:08:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:08:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:08:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:08:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:08:38,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:08:38,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 2024 transitions, 48132 flow. Second operand has 18 states, 18 states have (on average 137.83333333333334) internal successors, (2481), 18 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:08:38,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:08:38,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:08:38,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:08:41,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 12:08:48,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:09:00,931 INFO L130 PetriNetUnfolder]: 10288/20832 cut-off events. [2023-01-28 12:09:00,931 INFO L131 PetriNetUnfolder]: For 898493/898493 co-relation queries the response was YES. [2023-01-28 12:09:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235028 conditions, 20832 events. 10288/20832 cut-off events. For 898493/898493 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 204981 event pairs, 1549 based on Foata normal form. 123/20955 useless extension candidates. Maximal degree in co-relation 233324. Up to 11601 conditions per place. [2023-01-28 12:09:01,210 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1802 selfloop transitions, 816 changer transitions 17/2635 dead transitions. [2023-01-28 12:09:01,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 2635 transitions, 68595 flow [2023-01-28 12:09:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 12:09:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 12:09:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6210 transitions. [2023-01-28 12:09:01,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975672215108835 [2023-01-28 12:09:01,215 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6210 transitions. [2023-01-28 12:09:01,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6210 transitions. [2023-01-28 12:09:01,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:01,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6210 transitions. [2023-01-28 12:09:01,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 141.13636363636363) internal successors, (6210), 44 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:01,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 355.0) internal successors, (15975), 45 states have internal predecessors, (15975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:01,227 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 355.0) internal successors, (15975), 45 states have internal predecessors, (15975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:01,227 INFO L175 Difference]: Start difference. First operand has 361 places, 2024 transitions, 48132 flow. Second operand 44 states and 6210 transitions. [2023-01-28 12:09:01,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 2635 transitions, 68595 flow [2023-01-28 12:09:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 2635 transitions, 67798 flow, removed 121 selfloop flow, removed 11 redundant places. [2023-01-28 12:09:09,078 INFO L231 Difference]: Finished difference. Result has 416 places, 2211 transitions, 55712 flow [2023-01-28 12:09:09,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=47247, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=55712, PETRI_PLACES=416, PETRI_TRANSITIONS=2211} [2023-01-28 12:09:09,080 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-01-28 12:09:09,080 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 2211 transitions, 55712 flow [2023-01-28 12:09:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.83333333333334) internal successors, (2481), 18 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:09,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:09,081 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:09,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-28 12:09:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 12:09:09,283 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:09,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2030382679, now seen corresponding path program 20 times [2023-01-28 12:09:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491058041] [2023-01-28 12:09:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491058041] [2023-01-28 12:09:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491058041] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170810954] [2023-01-28 12:09:09,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:09:09,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:09,419 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:09:09,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 12:09:09,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:09:09,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:09:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:11,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170810954] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:11,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:11,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 12:09:11,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555901357] [2023-01-28 12:09:11,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:11,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:09:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:09:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:09:11,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:09:11,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 2211 transitions, 55712 flow. Second operand has 18 states, 18 states have (on average 138.22222222222223) internal successors, (2488), 18 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:11,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:11,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:09:11,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:09:15,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:09:37,756 INFO L130 PetriNetUnfolder]: 11060/22188 cut-off events. [2023-01-28 12:09:37,757 INFO L131 PetriNetUnfolder]: For 1214080/1214080 co-relation queries the response was YES. [2023-01-28 12:09:37,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268028 conditions, 22188 events. 11060/22188 cut-off events. For 1214080/1214080 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 217102 event pairs, 2681 based on Foata normal form. 190/22378 useless extension candidates. Maximal degree in co-relation 267586. Up to 12191 conditions per place. [2023-01-28 12:09:38,052 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1844 selfloop transitions, 1134 changer transitions 1/2979 dead transitions. [2023-01-28 12:09:38,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2979 transitions, 78261 flow [2023-01-28 12:09:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 12:09:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 12:09:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3997 transitions. [2023-01-28 12:09:38,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40211267605633805 [2023-01-28 12:09:38,055 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3997 transitions. [2023-01-28 12:09:38,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3997 transitions. [2023-01-28 12:09:38,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:09:38,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3997 transitions. [2023-01-28 12:09:38,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 142.75) internal successors, (3997), 28 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:38,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:38,063 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:38,063 INFO L175 Difference]: Start difference. First operand has 416 places, 2211 transitions, 55712 flow. Second operand 28 states and 3997 transitions. [2023-01-28 12:09:38,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2979 transitions, 78261 flow [2023-01-28 12:09:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2979 transitions, 75609 flow, removed 1191 selfloop flow, removed 7 redundant places. [2023-01-28 12:09:50,040 INFO L231 Difference]: Finished difference. Result has 447 places, 2410 transitions, 61923 flow [2023-01-28 12:09:50,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=53045, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=61923, PETRI_PLACES=447, PETRI_TRANSITIONS=2410} [2023-01-28 12:09:50,042 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 426 predicate places. [2023-01-28 12:09:50,042 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 2410 transitions, 61923 flow [2023-01-28 12:09:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.22222222222223) internal successors, (2488), 18 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:50,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:09:50,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:09:50,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 12:09:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:50,243 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:09:50,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:09:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1805883827, now seen corresponding path program 21 times [2023-01-28 12:09:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:09:50,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376371257] [2023-01-28 12:09:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:09:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:09:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:09:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:09:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376371257] [2023-01-28 12:09:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376371257] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:09:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114634207] [2023-01-28 12:09:50,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:09:50,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:09:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:09:50,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:09:50,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 12:09:50,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:09:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:09:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:09:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:09:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:50,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:09:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:09:50,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114634207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:09:50,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:09:50,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 12:09:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187502149] [2023-01-28 12:09:50,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:09:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:09:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:09:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:09:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:09:50,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:09:50,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 2410 transitions, 61923 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:09:50,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:09:50,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:09:50,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:10:07,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:10:27,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:10:51,622 INFO L130 PetriNetUnfolder]: 11608/23217 cut-off events. [2023-01-28 12:10:51,622 INFO L131 PetriNetUnfolder]: For 1465161/1465161 co-relation queries the response was YES. [2023-01-28 12:10:51,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293084 conditions, 23217 events. 11608/23217 cut-off events. For 1465161/1465161 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 228458 event pairs, 2637 based on Foata normal form. 87/23304 useless extension candidates. Maximal degree in co-relation 292655. Up to 12710 conditions per place. [2023-01-28 12:10:51,931 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1770 selfloop transitions, 1390 changer transitions 1/3161 dead transitions. [2023-01-28 12:10:51,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 3161 transitions, 84316 flow [2023-01-28 12:10:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 12:10:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 12:10:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5968 transitions. [2023-01-28 12:10:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40026827632461437 [2023-01-28 12:10:51,935 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5968 transitions. [2023-01-28 12:10:51,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5968 transitions. [2023-01-28 12:10:51,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:10:51,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5968 transitions. [2023-01-28 12:10:51,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 142.0952380952381) internal successors, (5968), 42 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:51,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:51,945 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:10:51,945 INFO L175 Difference]: Start difference. First operand has 447 places, 2410 transitions, 61923 flow. Second operand 42 states and 5968 transitions. [2023-01-28 12:10:51,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 3161 transitions, 84316 flow [2023-01-28 12:11:05,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 3161 transitions, 82239 flow, removed 815 selfloop flow, removed 10 redundant places. [2023-01-28 12:11:05,465 INFO L231 Difference]: Finished difference. Result has 487 places, 2540 transitions, 67585 flow [2023-01-28 12:11:05,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=60065, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=67585, PETRI_PLACES=487, PETRI_TRANSITIONS=2540} [2023-01-28 12:11:05,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-01-28 12:11:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 2540 transitions, 67585 flow [2023-01-28 12:11:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:11:05,467 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:11:05,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 12:11:05,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:05,672 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:11:05,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:11:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -388141745, now seen corresponding path program 22 times [2023-01-28 12:11:05,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:11:05,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32595191] [2023-01-28 12:11:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:11:05,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:11:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:11:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:05,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:11:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32595191] [2023-01-28 12:11:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32595191] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:11:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761119333] [2023-01-28 12:11:05,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:11:05,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:11:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:11:05,842 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:11:05,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 12:11:05,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:11:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:11:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:11:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:11:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:06,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:11:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:11:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761119333] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:11:08,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:11:08,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 12:11:08,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107012582] [2023-01-28 12:11:08,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:11:08,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:11:08,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:11:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:11:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:11:08,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:11:08,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 2540 transitions, 67585 flow. Second operand has 19 states, 19 states have (on average 137.89473684210526) internal successors, (2620), 19 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:11:08,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:11:08,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:11:08,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:11:28,534 WARN L222 SmtUtils]: Spent 11.62s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 12:11:46,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:11:48,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:11:55,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:12:36,140 INFO L130 PetriNetUnfolder]: 11976/23907 cut-off events. [2023-01-28 12:12:36,140 INFO L131 PetriNetUnfolder]: For 1694758/1694758 co-relation queries the response was YES. [2023-01-28 12:12:36,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312238 conditions, 23907 events. 11976/23907 cut-off events. For 1694758/1694758 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 236003 event pairs, 2794 based on Foata normal form. 72/23979 useless extension candidates. Maximal degree in co-relation 311797. Up to 13029 conditions per place. [2023-01-28 12:12:36,603 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1745 selfloop transitions, 1409 changer transitions 1/3155 dead transitions. [2023-01-28 12:12:36,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3155 transitions, 87004 flow [2023-01-28 12:12:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 12:12:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 12:12:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5394 transitions. [2023-01-28 12:12:36,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39985174203113416 [2023-01-28 12:12:36,606 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5394 transitions. [2023-01-28 12:12:36,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5394 transitions. [2023-01-28 12:12:36,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:12:36,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5394 transitions. [2023-01-28 12:12:36,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 141.94736842105263) internal successors, (5394), 38 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:36,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:36,616 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:36,616 INFO L175 Difference]: Start difference. First operand has 487 places, 2540 transitions, 67585 flow. Second operand 38 states and 5394 transitions. [2023-01-28 12:12:36,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3155 transitions, 87004 flow [2023-01-28 12:12:51,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 3155 transitions, 85255 flow, removed 325 selfloop flow, removed 27 redundant places. [2023-01-28 12:12:51,541 INFO L231 Difference]: Finished difference. Result has 502 places, 2630 transitions, 72347 flow [2023-01-28 12:12:51,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=65572, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=72347, PETRI_PLACES=502, PETRI_TRANSITIONS=2630} [2023-01-28 12:12:51,543 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 481 predicate places. [2023-01-28 12:12:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 2630 transitions, 72347 flow [2023-01-28 12:12:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.89473684210526) internal successors, (2620), 19 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:51,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:12:51,544 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:12:51,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 12:12:51,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 12:12:51,753 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:12:51,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:12:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash 678487734, now seen corresponding path program 23 times [2023-01-28 12:12:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:12:51,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036091363] [2023-01-28 12:12:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:12:51,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:12:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:12:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:51,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:12:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036091363] [2023-01-28 12:12:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036091363] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:12:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873237844] [2023-01-28 12:12:51,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:12:51,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:12:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:12:51,895 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:12:51,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 12:12:51,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 12:12:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:12:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:12:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:12:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:52,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:12:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:12:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873237844] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:12:52,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:12:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 12:12:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581614841] [2023-01-28 12:12:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:12:52,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:12:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:12:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:12:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:12:52,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:12:52,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 2630 transitions, 72347 flow. Second operand has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:12:52,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:12:52,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:12:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:13:02,585 WARN L222 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 35 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 12:13:05,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:13:25,237 INFO L130 PetriNetUnfolder]: 12066/24047 cut-off events. [2023-01-28 12:13:25,237 INFO L131 PetriNetUnfolder]: For 1897294/1897294 co-relation queries the response was YES. [2023-01-28 12:13:25,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324159 conditions, 24047 events. 12066/24047 cut-off events. For 1897294/1897294 co-relation queries the response was YES. Maximal size of possible extension queue 1631. Compared 236439 event pairs, 4732 based on Foata normal form. 62/24109 useless extension candidates. Maximal degree in co-relation 323475. Up to 22736 conditions per place. [2023-01-28 12:13:25,683 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2399 selfloop transitions, 399 changer transitions 0/2798 dead transitions. [2023-01-28 12:13:25,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2798 transitions, 81597 flow [2023-01-28 12:13:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 12:13:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 12:13:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5482 transitions. [2023-01-28 12:13:25,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39595521849042975 [2023-01-28 12:13:25,687 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5482 transitions. [2023-01-28 12:13:25,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5482 transitions. [2023-01-28 12:13:25,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:13:25,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5482 transitions. [2023-01-28 12:13:25,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 140.56410256410257) internal successors, (5482), 39 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:25,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:25,696 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:25,696 INFO L175 Difference]: Start difference. First operand has 502 places, 2630 transitions, 72347 flow. Second operand 39 states and 5482 transitions. [2023-01-28 12:13:25,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2798 transitions, 81597 flow [2023-01-28 12:13:42,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2798 transitions, 80385 flow, removed 334 selfloop flow, removed 19 redundant places. [2023-01-28 12:13:42,822 INFO L231 Difference]: Finished difference. Result has 539 places, 2691 transitions, 74100 flow [2023-01-28 12:13:42,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=71029, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=74100, PETRI_PLACES=539, PETRI_TRANSITIONS=2691} [2023-01-28 12:13:42,824 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 518 predicate places. [2023-01-28 12:13:42,824 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 2691 transitions, 74100 flow [2023-01-28 12:13:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:42,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:13:42,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:13:42,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 12:13:43,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 12:13:43,025 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:13:43,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:13:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1915137858, now seen corresponding path program 24 times [2023-01-28 12:13:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:13:43,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026201455] [2023-01-28 12:13:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:13:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:13:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:13:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:43,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:13:43,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026201455] [2023-01-28 12:13:43,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026201455] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:13:43,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421022834] [2023-01-28 12:13:43,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:13:43,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:13:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:13:43,155 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:13:43,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 12:13:43,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:13:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:13:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:13:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:13:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:43,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:13:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:13:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421022834] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:13:43,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:13:43,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 12:13:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144023967] [2023-01-28 12:13:43,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:13:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:13:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:13:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:13:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:13:43,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:13:43,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 2691 transitions, 74100 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:13:43,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:13:43,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:13:43,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:13:46,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:14:07,799 INFO L130 PetriNetUnfolder]: 12143/24229 cut-off events. [2023-01-28 12:14:07,799 INFO L131 PetriNetUnfolder]: For 2147041/2147041 co-relation queries the response was YES. [2023-01-28 12:14:08,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338883 conditions, 24229 events. 12143/24229 cut-off events. For 2147041/2147041 co-relation queries the response was YES. Maximal size of possible extension queue 1639. Compared 238715 event pairs, 4651 based on Foata normal form. 51/24280 useless extension candidates. Maximal degree in co-relation 338623. Up to 22363 conditions per place. [2023-01-28 12:14:08,211 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2323 selfloop transitions, 523 changer transitions 0/2846 dead transitions. [2023-01-28 12:14:08,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2846 transitions, 83665 flow [2023-01-28 12:14:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 12:14:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 12:14:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4790 transitions. [2023-01-28 12:14:08,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968516984258492 [2023-01-28 12:14:08,215 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4790 transitions. [2023-01-28 12:14:08,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4790 transitions. [2023-01-28 12:14:08,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:08,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4790 transitions. [2023-01-28 12:14:08,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 140.88235294117646) internal successors, (4790), 34 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:08,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 355.0) internal successors, (12425), 35 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:08,223 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 355.0) internal successors, (12425), 35 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:08,223 INFO L175 Difference]: Start difference. First operand has 539 places, 2691 transitions, 74100 flow. Second operand 34 states and 4790 transitions. [2023-01-28 12:14:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2846 transitions, 83665 flow [2023-01-28 12:14:30,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2846 transitions, 82827 flow, removed 273 selfloop flow, removed 13 redundant places. [2023-01-28 12:14:30,802 INFO L231 Difference]: Finished difference. Result has 565 places, 2745 transitions, 76755 flow [2023-01-28 12:14:30,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=73128, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=76755, PETRI_PLACES=565, PETRI_TRANSITIONS=2745} [2023-01-28 12:14:30,804 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-01-28 12:14:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2745 transitions, 76755 flow [2023-01-28 12:14:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:14:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:14:30,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 12:14:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:31,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:14:31,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:14:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash -494196172, now seen corresponding path program 25 times [2023-01-28 12:14:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:14:31,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114164983] [2023-01-28 12:14:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:14:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:14:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:14:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:14:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114164983] [2023-01-28 12:14:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114164983] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:14:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197381858] [2023-01-28 12:14:31,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:14:31,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:14:31,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:14:31,143 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:14:31,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 12:14:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:14:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:14:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:14:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:31,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:14:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:14:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197381858] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:14:31,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:14:31,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 12:14:31,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946911608] [2023-01-28 12:14:31,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:14:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:14:31,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:14:31,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:14:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:14:31,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:14:31,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2745 transitions, 76755 flow. Second operand has 20 states, 20 states have (on average 137.75) internal successors, (2755), 20 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:31,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:14:31,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:14:31,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:14:55,550 INFO L130 PetriNetUnfolder]: 12268/24447 cut-off events. [2023-01-28 12:14:55,551 INFO L131 PetriNetUnfolder]: For 2418218/2418218 co-relation queries the response was YES. [2023-01-28 12:14:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350711 conditions, 24447 events. 12268/24447 cut-off events. For 2418218/2418218 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 240731 event pairs, 4887 based on Foata normal form. 92/24539 useless extension candidates. Maximal degree in co-relation 349980. Up to 23489 conditions per place. [2023-01-28 12:14:56,124 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2606 selfloop transitions, 307 changer transitions 0/2913 dead transitions. [2023-01-28 12:14:56,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 2913 transitions, 86758 flow [2023-01-28 12:14:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 12:14:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 12:14:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5049 transitions. [2023-01-28 12:14:56,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39507042253521124 [2023-01-28 12:14:56,127 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5049 transitions. [2023-01-28 12:14:56,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5049 transitions. [2023-01-28 12:14:56,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:14:56,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5049 transitions. [2023-01-28 12:14:56,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 140.25) internal successors, (5049), 36 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:56,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 355.0) internal successors, (13135), 37 states have internal predecessors, (13135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:56,136 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 355.0) internal successors, (13135), 37 states have internal predecessors, (13135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:14:56,136 INFO L175 Difference]: Start difference. First operand has 565 places, 2745 transitions, 76755 flow. Second operand 36 states and 5049 transitions. [2023-01-28 12:14:56,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 2913 transitions, 86758 flow [2023-01-28 12:15:17,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 2913 transitions, 85484 flow, removed 271 selfloop flow, removed 18 redundant places. [2023-01-28 12:15:17,773 INFO L231 Difference]: Finished difference. Result has 596 places, 2821 transitions, 78921 flow [2023-01-28 12:15:17,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=75450, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=78921, PETRI_PLACES=596, PETRI_TRANSITIONS=2821} [2023-01-28 12:15:17,774 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 575 predicate places. [2023-01-28 12:15:17,775 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 2821 transitions, 78921 flow [2023-01-28 12:15:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.75) internal successors, (2755), 20 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:17,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:15:17,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:15:17,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 12:15:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:15:17,975 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:15:17,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:15:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1028808052, now seen corresponding path program 26 times [2023-01-28 12:15:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:15:17,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706840880] [2023-01-28 12:15:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:15:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:15:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:15:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:15:18,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706840880] [2023-01-28 12:15:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706840880] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:15:18,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874318579] [2023-01-28 12:15:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:15:18,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:15:18,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:15:18,164 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:15:18,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 12:15:18,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:15:18,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:15:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:15:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:15:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:18,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:15:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:15:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874318579] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:15:18,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:15:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 12:15:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962289062] [2023-01-28 12:15:18,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:15:18,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:15:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:15:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:15:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:15:18,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:15:18,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 2821 transitions, 78921 flow. Second operand has 20 states, 20 states have (on average 137.75) internal successors, (2755), 20 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:18,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:15:18,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:15:18,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:15:27,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:15:35,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 12:15:57,766 INFO L130 PetriNetUnfolder]: 13475/27165 cut-off events. [2023-01-28 12:15:57,766 INFO L131 PetriNetUnfolder]: For 2826496/2826496 co-relation queries the response was YES. [2023-01-28 12:15:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401733 conditions, 27165 events. 13475/27165 cut-off events. For 2826496/2826496 co-relation queries the response was YES. Maximal size of possible extension queue 1891. Compared 275647 event pairs, 4983 based on Foata normal form. 92/27257 useless extension candidates. Maximal degree in co-relation 400988. Up to 23421 conditions per place. [2023-01-28 12:15:58,300 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2695 selfloop transitions, 661 changer transitions 3/3359 dead transitions. [2023-01-28 12:15:58,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 3359 transitions, 102461 flow [2023-01-28 12:15:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 12:15:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 12:15:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5543 transitions. [2023-01-28 12:15:58,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40036114120621163 [2023-01-28 12:15:58,305 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5543 transitions. [2023-01-28 12:15:58,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5543 transitions. [2023-01-28 12:15:58,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:15:58,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5543 transitions. [2023-01-28 12:15:58,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 142.12820512820514) internal successors, (5543), 39 states have internal predecessors, (5543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:58,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:58,313 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:15:58,313 INFO L175 Difference]: Start difference. First operand has 596 places, 2821 transitions, 78921 flow. Second operand 39 states and 5543 transitions. [2023-01-28 12:15:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 3359 transitions, 102461 flow [2023-01-28 12:16:24,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 3359 transitions, 101570 flow, removed 387 selfloop flow, removed 10 redundant places. [2023-01-28 12:16:24,823 INFO L231 Difference]: Finished difference. Result has 644 places, 3164 transitions, 93665 flow [2023-01-28 12:16:24,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=78255, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=93665, PETRI_PLACES=644, PETRI_TRANSITIONS=3164} [2023-01-28 12:16:24,826 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 623 predicate places. [2023-01-28 12:16:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 3164 transitions, 93665 flow [2023-01-28 12:16:24,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.75) internal successors, (2755), 20 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:24,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:16:24,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:16:24,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 12:16:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:25,027 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:16:25,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:16:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1215710422, now seen corresponding path program 27 times [2023-01-28 12:16:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:16:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808899451] [2023-01-28 12:16:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:16:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:16:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:16:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:16:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808899451] [2023-01-28 12:16:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808899451] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:16:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242273363] [2023-01-28 12:16:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:16:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:16:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:16:25,171 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:16:25,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 12:16:25,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:16:25,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:16:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 12:16:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:16:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:26,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:16:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:16:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242273363] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:16:26,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:16:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 12:16:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607891490] [2023-01-28 12:16:26,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:16:26,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:16:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:16:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:16:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:16:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 12:16:26,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 3164 transitions, 93665 flow. Second operand has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:16:26,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:16:26,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 12:16:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:16:31,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 12:16:58,258 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 12:16:58,258 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 12:16:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 12:16:58,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 12:16:58,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 12:16:58,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 12:16:58,670 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 136/355 universal loopers) in iteration 37,while PetriNetUnfolder was constructing finite prefix that currently has 336835 conditions, 20560 events (11116/20559 cut-off events. For 2900411/2900411 co-relation queries the response was YES. Maximal size of possible extension queue 2038. Compared 202770 event pairs, 1925 based on Foata normal form. 123/22290 useless extension candidates. Maximal degree in co-relation 335894. Up to 11182 conditions per place.). [2023-01-28 12:16:58,672 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 12:16:58,672 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 12:16:58,672 INFO L445 BasicCegarLoop]: Path program histogram: [27, 5, 3, 1, 1] [2023-01-28 12:16:58,674 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 12:16:58,674 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 12:16:58,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 12:16:58 BasicIcfg [2023-01-28 12:16:58,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 12:16:58,676 INFO L158 Benchmark]: Toolchain (without parser) took 825136.16ms. Allocated memory was 476.1MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 428.0MB in the beginning and 2.5GB in the end (delta: -2.1GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2023-01-28 12:16:58,676 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 337.6MB. Free memory is still 287.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 12:16:58,677 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.75ms. Allocated memory is still 476.1MB. Free memory was 427.6MB in the beginning and 416.3MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 12:16:58,677 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.66ms. Allocated memory is still 476.1MB. Free memory was 416.3MB in the beginning and 414.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:16:58,677 INFO L158 Benchmark]: Boogie Preprocessor took 27.02ms. Allocated memory is still 476.1MB. Free memory was 414.2MB in the beginning and 412.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:16:58,677 INFO L158 Benchmark]: RCFGBuilder took 417.07ms. Allocated memory is still 476.1MB. Free memory was 412.9MB in the beginning and 395.8MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-28 12:16:58,677 INFO L158 Benchmark]: TraceAbstraction took 824448.67ms. Allocated memory was 476.1MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 395.3MB in the beginning and 2.5GB in the end (delta: -2.1GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2023-01-28 12:16:58,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 337.6MB. Free memory is still 287.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 189.75ms. Allocated memory is still 476.1MB. Free memory was 427.6MB in the beginning and 416.3MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.66ms. Allocated memory is still 476.1MB. Free memory was 416.3MB in the beginning and 414.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.02ms. Allocated memory is still 476.1MB. Free memory was 414.2MB in the beginning and 412.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 417.07ms. Allocated memory is still 476.1MB. Free memory was 412.9MB in the beginning and 395.8MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 824448.67ms. Allocated memory was 476.1MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 395.3MB in the beginning and 2.5GB in the end (delta: -2.1GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 152 PlacesBefore, 21 PlacesAfterwards, 160 TransitionsBefore, 17 TransitionsAfterwards, 2592 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 24 ConcurrentYvCompositions, 12 ChoiceCompositions, 185 TotalNumberOfCompositions, 2630 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2598, independent: 2589, independent conditional: 0, independent unconditional: 2589, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1564, independent: 1559, independent conditional: 0, independent unconditional: 1559, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2598, independent: 1030, independent conditional: 0, independent unconditional: 1030, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1564, unknown conditional: 0, unknown unconditional: 1564] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 136/355 universal loopers) in iteration 37,while PetriNetUnfolder was constructing finite prefix that currently has 336835 conditions, 20560 events (11116/20559 cut-off events. For 2900411/2900411 co-relation queries the response was YES. Maximal size of possible extension queue 2038. Compared 202770 event pairs, 1925 based on Foata normal form. 123/22290 useless extension candidates. Maximal degree in co-relation 335894. Up to 11182 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 136/355 universal loopers) in iteration 37,while PetriNetUnfolder was constructing finite prefix that currently has 336835 conditions, 20560 events (11116/20559 cut-off events. For 2900411/2900411 co-relation queries the response was YES. Maximal size of possible extension queue 2038. Compared 202770 event pairs, 1925 based on Foata normal form. 123/22290 useless extension candidates. Maximal degree in co-relation 335894. Up to 11182 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 136/355 universal loopers) in iteration 37,while PetriNetUnfolder was constructing finite prefix that currently has 336835 conditions, 20560 events (11116/20559 cut-off events. For 2900411/2900411 co-relation queries the response was YES. Maximal size of possible extension queue 2038. Compared 202770 event pairs, 1925 based on Foata normal form. 123/22290 useless extension candidates. Maximal degree in co-relation 335894. Up to 11182 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 216 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: 824.3s, OverallIterations: 37, TraceHistogramMax: 4, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 616.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 184 mSolverCounterUnknown, 4304 SdHoareTripleChecker+Valid, 74.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4304 mSDsluCounter, 475 SdHoareTripleChecker+Invalid, 71.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 743 IncrementalHoareTripleChecker+Unchecked, 358 mSDsCounter, 540 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19714 IncrementalHoareTripleChecker+Invalid, 21181 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 540 mSolverCounterUnsat, 117 mSDtfsCounter, 19714 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2094 GetRequests, 1083 SyntacticMatches, 41 SemanticMatches, 970 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 7392 ImplicationChecksByTransitivity, 178.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93665occurred in iteration=36, InterpolantAutomatonStates: 732, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 193.4s InterpolantComputationTime, 1303 NumberOfCodeBlocks, 1290 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1803 ConstructedInterpolants, 111 QuantifiedInterpolants, 23367 SizeOfPredicates, 199 NumberOfNonLiveVariables, 6168 ConjunctsInSsa, 626 ConjunctsInUnsatCore, 97 InterpolantComputations, 8 PerfectInterpolantSequences, 281/923 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