/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/pthread/stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:26:01,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:26:01,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:26:01,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:26:01,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:26:01,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:26:01,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:26:01,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:26:01,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:26:01,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:26:01,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:26:01,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:26:01,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:26:01,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:26:01,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:26:01,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:26:01,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:26:01,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:26:01,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:26:01,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:26:01,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:26:01,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:26:01,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:26:01,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:26:01,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:26:01,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:26:01,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:26:01,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:26:01,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:26:01,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:26:01,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:26:01,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:26:01,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:26:01,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:26:01,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:26:01,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:26:01,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:26:01,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:26:01,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:26:01,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:26:01,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:26:01,221 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 06:26:01,241 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:26:01,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:26:01,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:26:01,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:26:01,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:26:01,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:26:01,243 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:26:01,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:26:01,243 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:26:01,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:26:01,244 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:26:01,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:26:01,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:26:01,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:26:01,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:26:01,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:26:01,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:26:01,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:26:01,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:26:01,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:26:01,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:26:01,457 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:26:01,460 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:26:01,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-01-28 06:26:02,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:26:02,718 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:26:02,719 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-01-28 06:26:02,730 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5184c0a/b0f44d5ce9244efb8d277b1de520cbcc/FLAGda719d530 [2023-01-28 06:26:02,739 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5184c0a/b0f44d5ce9244efb8d277b1de520cbcc [2023-01-28 06:26:02,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:26:02,742 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:26:02,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:26:02,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:26:02,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:26:02,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:26:02" (1/1) ... [2023-01-28 06:26:02,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21fa124b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:02, skipping insertion in model container [2023-01-28 06:26:02,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:26:02" (1/1) ... [2023-01-28 06:26:02,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:26:02,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:26:03,021 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-01-28 06:26:03,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:26:03,048 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:26:03,074 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-01-28 06:26:03,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:26:03,124 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:26:03,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03 WrapperNode [2023-01-28 06:26:03,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:26:03,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:26:03,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:26:03,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:26:03,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,157 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-01-28 06:26:03,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:26:03,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:26:03,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:26:03,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:26:03,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:26:03,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:26:03,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:26:03,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:26:03,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (1/1) ... [2023-01-28 06:26:03,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:26:03,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:03,215 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 06:26:03,223 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 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-28 06:26:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-28 06:26:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 06:26:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:26:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:26:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:26:03,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:26:03,241 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 06:26:03,347 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:26:03,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:26:03,593 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:26:03,599 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:26:03,599 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:26:03,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:26:03 BoogieIcfgContainer [2023-01-28 06:26:03,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:26:03,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:26:03,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:26:03,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:26:03,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:26:02" (1/3) ... [2023-01-28 06:26:03,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62416840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:26:03, skipping insertion in model container [2023-01-28 06:26:03,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:26:03" (2/3) ... [2023-01-28 06:26:03,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62416840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:26:03, skipping insertion in model container [2023-01-28 06:26:03,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:26:03" (3/3) ... [2023-01-28 06:26:03,606 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-01-28 06:26:03,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:26:03,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 06:26:03,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:26:03,718 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 06:26:03,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 318 flow [2023-01-28 06:26:03,796 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-01-28 06:26:03,796 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:26:03,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 10/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 348 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-01-28 06:26:03,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 151 transitions, 318 flow [2023-01-28 06:26:03,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 140 transitions, 289 flow [2023-01-28 06:26:03,808 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:26:03,814 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 140 transitions, 289 flow [2023-01-28 06:26:03,816 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 140 transitions, 289 flow [2023-01-28 06:26:03,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 289 flow [2023-01-28 06:26:03,843 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-01-28 06:26:03,843 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:26:03,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 140 events. 10/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-01-28 06:26:03,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-01-28 06:26:06,487 INFO L134 LiptonReduction]: Checked pairs total: 8978 [2023-01-28 06:26:06,487 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-01-28 06:26:06,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:26:06,516 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;@3ff896f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:26:06,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 06:26:06,520 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-28 06:26:06,520 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:26:06,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:06,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 06:26:06,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:06,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 920078475, now seen corresponding path program 1 times [2023-01-28 06:26:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:06,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243642686] [2023-01-28 06:26:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:06,792 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 06:26:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243642686] [2023-01-28 06:26:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243642686] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:06,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:06,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:26:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982797334] [2023-01-28 06:26:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:26:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:26:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:26:06,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-01-28 06:26:06,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:06,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:06,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-01-28 06:26:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:06,970 INFO L130 PetriNetUnfolder]: 661/1082 cut-off events. [2023-01-28 06:26:06,970 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-01-28 06:26:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 1082 events. 661/1082 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4016 event pairs, 283 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 2034. Up to 687 conditions per place. [2023-01-28 06:26:06,978 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-01-28 06:26:06,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 227 flow [2023-01-28 06:26:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:26:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:26:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-01-28 06:26:06,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2023-01-28 06:26:06,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-01-28 06:26:06,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-01-28 06:26:06,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:06,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-01-28 06:26:07,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,011 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 436 transitions. [2023-01-28 06:26:07,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 227 flow [2023-01-28 06:26:07,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 53 transitions, 219 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 06:26:07,016 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-01-28 06:26:07,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-01-28 06:26:07,020 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-01-28 06:26:07,020 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-01-28 06:26:07,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:07,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:07,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:26:07,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:07,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:07,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273937, now seen corresponding path program 1 times [2023-01-28 06:26:07,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:07,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442491247] [2023-01-28 06:26:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:07,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:07,123 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 06:26:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442491247] [2023-01-28 06:26:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442491247] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:26:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481836809] [2023-01-28 06:26:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:26:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:26:07,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:26:07,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 282 [2023-01-28 06:26:07,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:07,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 282 [2023-01-28 06:26:07,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:07,246 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-01-28 06:26:07,246 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-01-28 06:26:07,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4441 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-01-28 06:26:07,250 INFO L137 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-01-28 06:26:07,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-01-28 06:26:07,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:26:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:26:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-01-28 06:26:07,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-01-28 06:26:07,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-01-28 06:26:07,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-01-28 06:26:07,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:07,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-01-28 06:26:07,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,255 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 450 transitions. [2023-01-28 06:26:07,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-01-28 06:26:07,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:26:07,258 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-01-28 06:26:07,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-01-28 06:26:07,258 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-01-28 06:26:07,258 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-01-28 06:26:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:26:07,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:07,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1760034202, now seen corresponding path program 1 times [2023-01-28 06:26:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125125411] [2023-01-28 06:26:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:07,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125125411] [2023-01-28 06:26:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125125411] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:26:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936928243] [2023-01-28 06:26:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:07,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:07,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:07,387 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 06:26:07,433 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 06:26:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 06:26:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:26:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:07,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:26:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936928243] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:26:07,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:26:07,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-01-28 06:26:07,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527435380] [2023-01-28 06:26:07,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:26:07,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:26:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:07,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:26:07,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:26:07,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 282 [2023-01-28 06:26:07,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 128.4) internal successors, (1284), 10 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:07,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:07,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 282 [2023-01-28 06:26:07,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:07,980 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2023-01-28 06:26:07,981 INFO L131 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2023-01-28 06:26:07,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12088 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-01-28 06:26:07,990 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-01-28 06:26:07,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-01-28 06:26:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 06:26:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 06:26:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1687 transitions. [2023-01-28 06:26:07,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985224586288416 [2023-01-28 06:26:07,994 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1687 transitions. [2023-01-28 06:26:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1687 transitions. [2023-01-28 06:26:07,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:07,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1687 transitions. [2023-01-28 06:26:07,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.58333333333334) internal successors, (1687), 12 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,002 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,002 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1687 transitions. [2023-01-28 06:26:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-01-28 06:26:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:26:08,008 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-01-28 06:26:08,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-01-28 06:26:08,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-01-28 06:26:08,010 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-01-28 06:26:08,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.4) internal successors, (1284), 10 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:08,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:08,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 06:26:08,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:08,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:08,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121817, now seen corresponding path program 1 times [2023-01-28 06:26:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:08,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939522166] [2023-01-28 06:26:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:08,270 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 06:26:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939522166] [2023-01-28 06:26:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939522166] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:08,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:26:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267708374] [2023-01-28 06:26:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:08,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:26:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:26:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:26:08,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 282 [2023-01-28 06:26:08,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:08,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 282 [2023-01-28 06:26:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:08,354 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2023-01-28 06:26:08,354 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-01-28 06:26:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4170 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-01-28 06:26:08,358 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-01-28 06:26:08,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-01-28 06:26:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:26:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:26:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-01-28 06:26:08,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059101654846335 [2023-01-28 06:26:08,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-01-28 06:26:08,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-01-28 06:26:08,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:08,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-01-28 06:26:08,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,362 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 428 transitions. [2023-01-28 06:26:08,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-01-28 06:26:08,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-01-28 06:26:08,365 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-01-28 06:26:08,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-01-28 06:26:08,366 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-01-28 06:26:08,366 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-01-28 06:26:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:08,367 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 06:26:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:26:08,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:08,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1945408692, now seen corresponding path program 1 times [2023-01-28 06:26:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:08,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254145774] [2023-01-28 06:26:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:08,407 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 06:26:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254145774] [2023-01-28 06:26:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254145774] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:08,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:08,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:26:08,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999779077] [2023-01-28 06:26:08,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:08,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:26:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:26:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:26:08,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-01-28 06:26:08,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:08,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-01-28 06:26:08,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:08,531 INFO L130 PetriNetUnfolder]: 624/1145 cut-off events. [2023-01-28 06:26:08,531 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-01-28 06:26:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1145 events. 624/1145 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4699 event pairs, 391 based on Foata normal form. 24/1169 useless extension candidates. Maximal degree in co-relation 2382. Up to 849 conditions per place. [2023-01-28 06:26:08,535 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-01-28 06:26:08,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 383 flow [2023-01-28 06:26:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:26:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:26:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-01-28 06:26:08,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-01-28 06:26:08,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-01-28 06:26:08,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-01-28 06:26:08,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:08,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-01-28 06:26:08,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,539 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 432 transitions. [2023-01-28 06:26:08,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 383 flow [2023-01-28 06:26:08,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:26:08,541 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-01-28 06:26:08,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-01-28 06:26:08,542 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-01-28 06:26:08,542 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-01-28 06:26:08,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:08,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:08,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:26:08,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:08,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash 498757517, now seen corresponding path program 1 times [2023-01-28 06:26:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:08,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092464454] [2023-01-28 06:26:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:08,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:09,012 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 06:26:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092464454] [2023-01-28 06:26:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092464454] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-28 06:26:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787435474] [2023-01-28 06:26:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 06:26:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 06:26:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-01-28 06:26:09,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 282 [2023-01-28 06:26:09,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:09,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:09,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 282 [2023-01-28 06:26:09,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:09,623 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2023-01-28 06:26:09,624 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2023-01-28 06:26:09,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7869 event pairs, 249 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2023-01-28 06:26:09,635 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2023-01-28 06:26:09,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2023-01-28 06:26:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 06:26:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 06:26:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1046 transitions. [2023-01-28 06:26:09,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41213553979511425 [2023-01-28 06:26:09,638 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1046 transitions. [2023-01-28 06:26:09,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1046 transitions. [2023-01-28 06:26:09,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:09,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1046 transitions. [2023-01-28 06:26:09,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 9 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:09,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:09,643 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:09,643 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1046 transitions. [2023-01-28 06:26:09,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2023-01-28 06:26:09,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-28 06:26:09,648 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2023-01-28 06:26:09,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-01-28 06:26:09,648 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-01-28 06:26:09,649 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2023-01-28 06:26:09,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:09,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:09,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:26:09,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:09,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 858373001, now seen corresponding path program 2 times [2023-01-28 06:26:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:09,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739847917] [2023-01-28 06:26:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:10,173 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 06:26:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739847917] [2023-01-28 06:26:10,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739847917] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:10,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-28 06:26:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528390043] [2023-01-28 06:26:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 06:26:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 06:26:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-01-28 06:26:10,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 282 [2023-01-28 06:26:10,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:10,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:10,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 282 [2023-01-28 06:26:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:10,789 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2023-01-28 06:26:10,789 INFO L131 PetriNetUnfolder]: For 1260/1260 co-relation queries the response was YES. [2023-01-28 06:26:10,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10771 event pairs, 301 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2023-01-28 06:26:10,811 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2023-01-28 06:26:10,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2023-01-28 06:26:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 06:26:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 06:26:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1046 transitions. [2023-01-28 06:26:10,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41213553979511425 [2023-01-28 06:26:10,813 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1046 transitions. [2023-01-28 06:26:10,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1046 transitions. [2023-01-28 06:26:10,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:10,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1046 transitions. [2023-01-28 06:26:10,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 9 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:10,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:10,818 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:10,818 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1046 transitions. [2023-01-28 06:26:10,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2023-01-28 06:26:10,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:26:10,823 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2023-01-28 06:26:10,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-01-28 06:26:10,824 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-01-28 06:26:10,824 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2023-01-28 06:26:10,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:10,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:10,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:26:10,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:10,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2064601814, now seen corresponding path program 1 times [2023-01-28 06:26:10,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:10,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587325388] [2023-01-28 06:26:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:10,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:10,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587325388] [2023-01-28 06:26:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587325388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:26:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509690530] [2023-01-28 06:26:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:10,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:10,905 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 06:26:10,968 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 06:26:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 06:26:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:26:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:26:11,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 06:26:11,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509690530] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:11,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 06:26:11,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-01-28 06:26:11,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110476132] [2023-01-28 06:26:11,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 06:26:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 06:26:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:26:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-01-28 06:26:11,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:11,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-01-28 06:26:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:11,358 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2023-01-28 06:26:11,358 INFO L131 PetriNetUnfolder]: For 1999/1999 co-relation queries the response was YES. [2023-01-28 06:26:11,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10876 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2023-01-28 06:26:11,368 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-01-28 06:26:11,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2023-01-28 06:26:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:26:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:26:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 822 transitions. [2023-01-28 06:26:11,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2023-01-28 06:26:11,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 822 transitions. [2023-01-28 06:26:11,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 822 transitions. [2023-01-28 06:26:11,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:11,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 822 transitions. [2023-01-28 06:26:11,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,375 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 822 transitions. [2023-01-28 06:26:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2023-01-28 06:26:11,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-01-28 06:26:11,382 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2023-01-28 06:26:11,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-01-28 06:26:11,382 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-01-28 06:26:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2023-01-28 06:26:11,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:11,383 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 06:26:11,391 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 06:26:11,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-28 06:26:11,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:11,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431302, now seen corresponding path program 2 times [2023-01-28 06:26:11,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:11,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993884916] [2023-01-28 06:26:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:11,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993884916] [2023-01-28 06:26:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993884916] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:26:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723007242] [2023-01-28 06:26:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:26:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:11,730 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 06:26:11,743 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 06:26:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 06:26:11,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:26:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 06:26:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:26:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:11,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:26:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:11,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723007242] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:26:11,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:26:11,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-01-28 06:26:11,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608748434] [2023-01-28 06:26:11,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:26:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 06:26:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:11,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 06:26:11,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-01-28 06:26:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 282 [2023-01-28 06:26:11,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 123.3) internal successors, (2466), 20 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:11,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:11,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 282 [2023-01-28 06:26:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:12,554 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2023-01-28 06:26:12,555 INFO L131 PetriNetUnfolder]: For 3963/3963 co-relation queries the response was YES. [2023-01-28 06:26:12,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14014 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2023-01-28 06:26:12,569 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2023-01-28 06:26:12,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2023-01-28 06:26:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 06:26:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 06:26:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2760 transitions. [2023-01-28 06:26:12,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46605876393110435 [2023-01-28 06:26:12,574 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2760 transitions. [2023-01-28 06:26:12,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2760 transitions. [2023-01-28 06:26:12,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:12,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2760 transitions. [2023-01-28 06:26:12,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.42857142857142) internal successors, (2760), 21 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:12,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:12,635 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:12,636 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 2760 transitions. [2023-01-28 06:26:12,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2023-01-28 06:26:12,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-28 06:26:12,645 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2023-01-28 06:26:12,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-01-28 06:26:12,646 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-01-28 06:26:12,646 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2023-01-28 06:26:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 123.3) internal successors, (2466), 20 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:12,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:12,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:12,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 06:26:12,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:12,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:12,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash 878136134, now seen corresponding path program 3 times [2023-01-28 06:26:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:12,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236404590] [2023-01-28 06:26:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:26:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236404590] [2023-01-28 06:26:13,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236404590] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:26:13,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:26:13,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 06:26:13,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609889505] [2023-01-28 06:26:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:26:13,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 06:26:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 06:26:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-01-28 06:26:13,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-01-28 06:26:13,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 90.86666666666666) internal successors, (1363), 15 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:13,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:13,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-01-28 06:26:13,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:14,668 INFO L130 PetriNetUnfolder]: 2736/5048 cut-off events. [2023-01-28 06:26:14,668 INFO L131 PetriNetUnfolder]: For 10240/10240 co-relation queries the response was YES. [2023-01-28 06:26:14,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17212 conditions, 5048 events. 2736/5048 cut-off events. For 10240/10240 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26377 event pairs, 757 based on Foata normal form. 0/5023 useless extension candidates. Maximal degree in co-relation 15582. Up to 1610 conditions per place. [2023-01-28 06:26:14,692 INFO L137 encePairwiseOnDemand]: 264/282 looper letters, 162 selfloop transitions, 131 changer transitions 4/297 dead transitions. [2023-01-28 06:26:14,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 297 transitions, 2729 flow [2023-01-28 06:26:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 06:26:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 06:26:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2566 transitions. [2023-01-28 06:26:14,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33701076963488313 [2023-01-28 06:26:14,697 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2566 transitions. [2023-01-28 06:26:14,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2566 transitions. [2023-01-28 06:26:14,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:14,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2566 transitions. [2023-01-28 06:26:14,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.03703703703704) internal successors, (2566), 27 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:14,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:14,708 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:14,708 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 2566 transitions. [2023-01-28 06:26:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 297 transitions, 2729 flow [2023-01-28 06:26:14,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 297 transitions, 2503 flow, removed 78 selfloop flow, removed 8 redundant places. [2023-01-28 06:26:14,737 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2023-01-28 06:26:14,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2023-01-28 06:26:14,738 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-01-28 06:26:14,738 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2023-01-28 06:26:14,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.86666666666666) internal successors, (1363), 15 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:14,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:14,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:26:14,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:14,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -7541718, now seen corresponding path program 4 times [2023-01-28 06:26:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226527973] [2023-01-28 06:26:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:26:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226527973] [2023-01-28 06:26:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226527973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:26:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826204713] [2023-01-28 06:26:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 06:26:15,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:15,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:15,241 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 06:26:15,243 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 06:26:15,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 06:26:15,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:26:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 06:26:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:26:15,398 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-01-28 06:26:15,398 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-01-28 06:26:15,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 06:26:15,795 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 40 treesize of output 36 [2023-01-28 06:26:16,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-01-28 06:26:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:16,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:26:16,522 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_360) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-01-28 06:26:16,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:26:16,532 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 29 treesize of output 30 [2023-01-28 06:26:16,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:26:16,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-01-28 06:26:16,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-01-28 06:26:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:26:16,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826204713] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:26:16,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:26:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2023-01-28 06:26:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883692508] [2023-01-28 06:26:16,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:26:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 06:26:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 06:26:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1820, Unknown=1, NotChecked=86, Total=2070 [2023-01-28 06:26:16,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-01-28 06:26:16,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:16,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:16,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-01-28 06:26:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:22,962 INFO L130 PetriNetUnfolder]: 3584/6680 cut-off events. [2023-01-28 06:26:22,962 INFO L131 PetriNetUnfolder]: For 17054/17054 co-relation queries the response was YES. [2023-01-28 06:26:22,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24776 conditions, 6680 events. 3584/6680 cut-off events. For 17054/17054 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 38065 event pairs, 544 based on Foata normal form. 54/6697 useless extension candidates. Maximal degree in co-relation 20420. Up to 1562 conditions per place. [2023-01-28 06:26:23,003 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 274 selfloop transitions, 299 changer transitions 15/588 dead transitions. [2023-01-28 06:26:23,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 588 transitions, 5201 flow [2023-01-28 06:26:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-01-28 06:26:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-01-28 06:26:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6173 transitions. [2023-01-28 06:26:23,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321912807676262 [2023-01-28 06:26:23,013 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6173 transitions. [2023-01-28 06:26:23,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6173 transitions. [2023-01-28 06:26:23,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:26:23,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6173 transitions. [2023-01-28 06:26:23,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 90.77941176470588) internal successors, (6173), 68 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:23,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:23,048 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:23,048 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 68 states and 6173 transitions. [2023-01-28 06:26:23,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 588 transitions, 5201 flow [2023-01-28 06:26:23,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 588 transitions, 4980 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-01-28 06:26:23,117 INFO L231 Difference]: Finished difference. Result has 214 places, 345 transitions, 3990 flow [2023-01-28 06:26:23,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3990, PETRI_PLACES=214, PETRI_TRANSITIONS=345} [2023-01-28 06:26:23,118 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 180 predicate places. [2023-01-28 06:26:23,118 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 345 transitions, 3990 flow [2023-01-28 06:26:23,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:23,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:26:23,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:26:23,145 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 06:26:23,325 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 06:26:23,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:26:23,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:26:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 366211873, now seen corresponding path program 1 times [2023-01-28 06:26:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:26:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900621013] [2023-01-28 06:26:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:23,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:26:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:26:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900621013] [2023-01-28 06:26:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900621013] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:26:24,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686134960] [2023-01-28 06:26:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:26:24,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:26:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:26:24,315 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 06:26:24,317 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 06:26:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:26:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 06:26:24,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:26:24,593 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 19 treesize of output 15 [2023-01-28 06:26:24,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2023-01-28 06:26:30,029 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 06:26:30,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 46 [2023-01-28 06:26:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:30,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:26:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-01-28 06:26:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:26:32,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686134960] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:26:32,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:26:32,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2023-01-28 06:26:32,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577442032] [2023-01-28 06:26:32,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:26:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-01-28 06:26:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:26:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-01-28 06:26:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3924, Unknown=2, NotChecked=0, Total=4290 [2023-01-28 06:26:32,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-01-28 06:26:32,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 345 transitions, 3990 flow. Second operand has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:26:32,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:26:32,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-01-28 06:26:32,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:26:59,127 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 06:27:16,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 06:27:18,111 WARN L539 Checker$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 06:27:24,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:27:26,040 WARN L539 Checker$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 06:27:40,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:27:42,669 WARN L539 Checker$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 06:27:44,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:28:01,605 WARN L539 Checker$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 06:28:03,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:28:05,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:28:07,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:28:09,835 WARN L539 Checker$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 06:28:14,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:28:16,115 WARN L539 Checker$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 06:28:20,000 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 06:28:20,818 INFO L130 PetriNetUnfolder]: 6618/12412 cut-off events. [2023-01-28 06:28:20,819 INFO L131 PetriNetUnfolder]: For 132000/132000 co-relation queries the response was YES. [2023-01-28 06:28:20,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76861 conditions, 12412 events. 6618/12412 cut-off events. For 132000/132000 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 80465 event pairs, 1368 based on Foata normal form. 68/12421 useless extension candidates. Maximal degree in co-relation 65145. Up to 4620 conditions per place. [2023-01-28 06:28:20,923 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 716 selfloop transitions, 448 changer transitions 214/1378 dead transitions. [2023-01-28 06:28:20,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1378 transitions, 16893 flow [2023-01-28 06:28:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-01-28 06:28:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-01-28 06:28:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 15306 transitions. [2023-01-28 06:28:20,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350407144733386 [2023-01-28 06:28:20,948 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 15306 transitions. [2023-01-28 06:28:20,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 15306 transitions. [2023-01-28 06:28:20,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:28:20,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 15306 transitions. [2023-01-28 06:28:20,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 94.48148148148148) internal successors, (15306), 162 states have internal predecessors, (15306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:28:21,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:28:21,013 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:28:21,013 INFO L175 Difference]: Start difference. First operand has 214 places, 345 transitions, 3990 flow. Second operand 162 states and 15306 transitions. [2023-01-28 06:28:21,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1378 transitions, 16893 flow [2023-01-28 06:28:21,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1378 transitions, 15907 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-01-28 06:28:21,471 INFO L231 Difference]: Finished difference. Result has 389 places, 702 transitions, 8405 flow [2023-01-28 06:28:21,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=8405, PETRI_PLACES=389, PETRI_TRANSITIONS=702} [2023-01-28 06:28:21,474 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 355 predicate places. [2023-01-28 06:28:21,474 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 702 transitions, 8405 flow [2023-01-28 06:28:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:28:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:28:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:28:21,482 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 06:28:21,682 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 06:28:21,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:28:21,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:28:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash -765198685, now seen corresponding path program 2 times [2023-01-28 06:28:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:28:21,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727890770] [2023-01-28 06:28:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:28:21,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:28:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:28:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:22,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:28:22,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727890770] [2023-01-28 06:28:22,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727890770] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:28:22,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021119248] [2023-01-28 06:28:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:28:22,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:28:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:28:22,629 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 06:28:22,633 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 06:28:22,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 06:28:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:28:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 95 conjunts are in the unsatisfiable core [2023-01-28 06:28:22,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:28:22,859 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 06:28:22,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-01-28 06:28:23,028 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 06:28:23,067 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 21 treesize of output 21 [2023-01-28 06:28:23,379 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-01-28 06:28:23,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 34 treesize of output 37 [2023-01-28 06:28:23,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-01-28 06:28:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:23,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:28:24,660 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_497 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_497) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-01-28 06:28:24,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:28:24,666 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 29 treesize of output 30 [2023-01-28 06:28:24,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:28:24,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-01-28 06:28:24,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-01-28 06:28:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021119248] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:28:24,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:28:24,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 57 [2023-01-28 06:28:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960078544] [2023-01-28 06:28:24,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:28:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-01-28 06:28:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:28:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-01-28 06:28:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3106, Unknown=1, NotChecked=112, Total=3422 [2023-01-28 06:28:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-01-28 06:28:24,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 702 transitions, 8405 flow. Second operand has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:28:24,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:28:24,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-01-28 06:28:24,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:04,863 INFO L130 PetriNetUnfolder]: 10009/18967 cut-off events. [2023-01-28 06:29:04,863 INFO L131 PetriNetUnfolder]: For 215155/215155 co-relation queries the response was YES. [2023-01-28 06:29:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120731 conditions, 18967 events. 10009/18967 cut-off events. For 215155/215155 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 130616 event pairs, 891 based on Foata normal form. 268/19155 useless extension candidates. Maximal degree in co-relation 117979. Up to 6602 conditions per place. [2023-01-28 06:29:05,046 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 554 selfloop transitions, 1162 changer transitions 111/1827 dead transitions. [2023-01-28 06:29:05,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1827 transitions, 24299 flow [2023-01-28 06:29:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-01-28 06:29:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-01-28 06:29:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 15923 transitions. [2023-01-28 06:29:05,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31900869495532314 [2023-01-28 06:29:05,059 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 15923 transitions. [2023-01-28 06:29:05,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 15923 transitions. [2023-01-28 06:29:05,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:05,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 15923 transitions. [2023-01-28 06:29:05,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 89.96045197740114) internal successors, (15923), 177 states have internal predecessors, (15923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:05,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 282.0) internal successors, (50196), 178 states have internal predecessors, (50196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:05,110 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 282.0) internal successors, (50196), 178 states have internal predecessors, (50196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:05,110 INFO L175 Difference]: Start difference. First operand has 389 places, 702 transitions, 8405 flow. Second operand 177 states and 15923 transitions. [2023-01-28 06:29:05,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1827 transitions, 24299 flow [2023-01-28 06:29:05,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1827 transitions, 23444 flow, removed 332 selfloop flow, removed 16 redundant places. [2023-01-28 06:29:05,673 INFO L231 Difference]: Finished difference. Result has 547 places, 1258 transitions, 17468 flow [2023-01-28 06:29:05,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=17468, PETRI_PLACES=547, PETRI_TRANSITIONS=1258} [2023-01-28 06:29:05,674 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 513 predicate places. [2023-01-28 06:29:05,674 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1258 transitions, 17468 flow [2023-01-28 06:29:05,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:05,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:05,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:05,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 06:29:05,877 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 06:29:05,878 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:29:05,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -620239400, now seen corresponding path program 2 times [2023-01-28 06:29:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:05,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62843443] [2023-01-28 06:29:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:06,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:06,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62843443] [2023-01-28 06:29:06,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62843443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:29:06,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916647466] [2023-01-28 06:29:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:29:06,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:29:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:29:06,067 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 06:29:06,070 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 06:29:06,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 06:29:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:29:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 06:29:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:29:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:06,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:29:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916647466] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:29:06,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:29:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-01-28 06:29:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010909851] [2023-01-28 06:29:06,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:29:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 06:29:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 06:29:06,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-01-28 06:29:06,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 282 [2023-01-28 06:29:06,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1258 transitions, 17468 flow. Second operand has 22 states, 22 states have (on average 122.04545454545455) internal successors, (2685), 22 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:06,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:06,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 282 [2023-01-28 06:29:06,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:13,399 INFO L130 PetriNetUnfolder]: 11059/21057 cut-off events. [2023-01-28 06:29:13,400 INFO L131 PetriNetUnfolder]: For 256578/256578 co-relation queries the response was YES. [2023-01-28 06:29:13,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144569 conditions, 21057 events. 11059/21057 cut-off events. For 256578/256578 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 148645 event pairs, 2637 based on Foata normal form. 108/21141 useless extension candidates. Maximal degree in co-relation 142455. Up to 7194 conditions per place. [2023-01-28 06:29:13,666 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 988 selfloop transitions, 783 changer transitions 12/1783 dead transitions. [2023-01-28 06:29:13,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1783 transitions, 27588 flow [2023-01-28 06:29:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 06:29:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 06:29:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3429 transitions. [2023-01-28 06:29:13,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2023-01-28 06:29:13,670 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3429 transitions. [2023-01-28 06:29:13,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3429 transitions. [2023-01-28 06:29:13,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:13,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3429 transitions. [2023-01-28 06:29:13,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 127.0) internal successors, (3429), 27 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,676 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,676 INFO L175 Difference]: Start difference. First operand has 547 places, 1258 transitions, 17468 flow. Second operand 27 states and 3429 transitions. [2023-01-28 06:29:13,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1783 transitions, 27588 flow [2023-01-28 06:29:14,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1783 transitions, 25646 flow, removed 825 selfloop flow, removed 22 redundant places. [2023-01-28 06:29:14,681 INFO L231 Difference]: Finished difference. Result has 553 places, 1366 transitions, 20221 flow [2023-01-28 06:29:14,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=15519, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20221, PETRI_PLACES=553, PETRI_TRANSITIONS=1366} [2023-01-28 06:29:14,682 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 519 predicate places. [2023-01-28 06:29:14,682 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1366 transitions, 20221 flow [2023-01-28 06:29:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.04545454545455) internal successors, (2685), 22 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:14,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:14,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 06:29:14,887 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 06:29:14,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:29:14,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1841042545, now seen corresponding path program 3 times [2023-01-28 06:29:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142401346] [2023-01-28 06:29:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:16,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:16,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142401346] [2023-01-28 06:29:16,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142401346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:29:16,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011276400] [2023-01-28 06:29:16,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 06:29:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:29:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:29:16,328 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 06:29:16,329 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 06:29:16,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 06:29:16,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:29:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 95 conjunts are in the unsatisfiable core [2023-01-28 06:29:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:29:16,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 06:29:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:29:17,159 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 49 treesize of output 36 [2023-01-28 06:29:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:29:17,594 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 49 treesize of output 36 [2023-01-28 06:29:18,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-01-28 06:29:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:18,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:29:22,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-01-28 06:29:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011276400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:29:22,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:29:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 78 [2023-01-28 06:29:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410236622] [2023-01-28 06:29:22,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:29:22,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-01-28 06:29:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-01-28 06:29:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5875, Unknown=1, NotChecked=0, Total=6162 [2023-01-28 06:29:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-01-28 06:29:22,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1366 transitions, 20221 flow. Second operand has 79 states, 79 states have (on average 90.9367088607595) internal successors, (7184), 79 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:22,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-01-28 06:29:22,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:30:22,897 INFO L130 PetriNetUnfolder]: 22476/42944 cut-off events. [2023-01-28 06:30:22,897 INFO L131 PetriNetUnfolder]: For 538982/538982 co-relation queries the response was YES. [2023-01-28 06:30:23,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297588 conditions, 42944 events. 22476/42944 cut-off events. For 538982/538982 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 339032 event pairs, 2932 based on Foata normal form. 330/43232 useless extension candidates. Maximal degree in co-relation 295177. Up to 14329 conditions per place. [2023-01-28 06:30:23,860 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 822 selfloop transitions, 2499 changer transitions 108/3429 dead transitions. [2023-01-28 06:30:23,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 3429 transitions, 55268 flow [2023-01-28 06:30:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-01-28 06:30:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-01-28 06:30:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 15241 transitions. [2023-01-28 06:30:23,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33361789685666754 [2023-01-28 06:30:23,871 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 15241 transitions. [2023-01-28 06:30:23,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 15241 transitions. [2023-01-28 06:30:23,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:30:23,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 15241 transitions. [2023-01-28 06:30:23,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 94.08024691358025) internal successors, (15241), 162 states have internal predecessors, (15241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:23,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:23,912 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:23,912 INFO L175 Difference]: Start difference. First operand has 553 places, 1366 transitions, 20221 flow. Second operand 162 states and 15241 transitions. [2023-01-28 06:30:23,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 3429 transitions, 55268 flow [2023-01-28 06:30:26,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 3429 transitions, 53004 flow, removed 591 selfloop flow, removed 11 redundant places. [2023-01-28 06:30:26,890 INFO L231 Difference]: Finished difference. Result has 721 places, 2719 transitions, 45550 flow [2023-01-28 06:30:26,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=19206, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=45550, PETRI_PLACES=721, PETRI_TRANSITIONS=2719} [2023-01-28 06:30:26,892 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 687 predicate places. [2023-01-28 06:30:26,892 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 2719 transitions, 45550 flow [2023-01-28 06:30:26,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 90.9367088607595) internal successors, (7184), 79 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:26,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:30:26,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:30:26,897 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 06:30:27,097 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 06:30:27,098 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:30:27,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:30:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -809020241, now seen corresponding path program 4 times [2023-01-28 06:30:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:30:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163326841] [2023-01-28 06:30:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:30:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:30:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:30:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:30:28,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:30:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163326841] [2023-01-28 06:30:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163326841] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:30:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720065465] [2023-01-28 06:30:28,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 06:30:28,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:30:28,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:30:28,725 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 06:30:28,727 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 06:30:28,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 06:30:28,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:30:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 114 conjunts are in the unsatisfiable core [2023-01-28 06:30:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:30:28,883 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 06:30:28,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-01-28 06:30:29,039 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 06:30:29,078 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 21 treesize of output 21 [2023-01-28 06:30:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:30:29,366 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 30 treesize of output 25 [2023-01-28 06:30:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:30:29,611 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 30 treesize of output 25 [2023-01-28 06:30:30,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-01-28 06:30:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:30:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:30:31,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:30:31,696 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 29 treesize of output 30 [2023-01-28 06:30:31,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:30:31,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-01-28 06:30:31,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-01-28 06:30:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:30:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720065465] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:30:31,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:30:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 26] total 82 [2023-01-28 06:30:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537928952] [2023-01-28 06:30:31,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:30:31,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-01-28 06:30:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:30:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-01-28 06:30:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=6570, Unknown=9, NotChecked=0, Total=6972 [2023-01-28 06:30:31,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-01-28 06:30:31,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 2719 transitions, 45550 flow. Second operand has 84 states, 84 states have (on average 86.77380952380952) internal successors, (7289), 84 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:31,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:30:31,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-01-28 06:30:31,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:39,458 INFO L130 PetriNetUnfolder]: 40768/78037 cut-off events. [2023-01-28 06:34:39,459 INFO L131 PetriNetUnfolder]: For 1046012/1046012 co-relation queries the response was YES. [2023-01-28 06:34:41,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567250 conditions, 78037 events. 40768/78037 cut-off events. For 1046012/1046012 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 684563 event pairs, 3719 based on Foata normal form. 448/78406 useless extension candidates. Maximal degree in co-relation 564706. Up to 26027 conditions per place. [2023-01-28 06:34:41,622 INFO L137 encePairwiseOnDemand]: 262/282 looper letters, 1381 selfloop transitions, 5180 changer transitions 365/6926 dead transitions. [2023-01-28 06:34:41,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1161 places, 6926 transitions, 118973 flow [2023-01-28 06:34:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2023-01-28 06:34:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2023-01-28 06:34:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 39569 transitions. [2023-01-28 06:34:41,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31817597015165405 [2023-01-28 06:34:41,689 INFO L72 ComplementDD]: Start complementDD. Operand 441 states and 39569 transitions. [2023-01-28 06:34:41,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 441 states and 39569 transitions. [2023-01-28 06:34:41,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:41,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 441 states and 39569 transitions. [2023-01-28 06:34:41,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 442 states, 441 states have (on average 89.72562358276645) internal successors, (39569), 441 states have internal predecessors, (39569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:34:42,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 442 states, 442 states have (on average 282.0) internal successors, (124644), 442 states have internal predecessors, (124644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:34:42,088 INFO L81 ComplementDD]: Finished complementDD. Result has 442 states, 442 states have (on average 282.0) internal successors, (124644), 442 states have internal predecessors, (124644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:34:42,088 INFO L175 Difference]: Start difference. First operand has 721 places, 2719 transitions, 45550 flow. Second operand 441 states and 39569 transitions. [2023-01-28 06:34:42,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1161 places, 6926 transitions, 118973 flow [2023-01-28 06:34:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1124 places, 6926 transitions, 112773 flow, removed 518 selfloop flow, removed 37 redundant places. [2023-01-28 06:34:51,543 INFO L231 Difference]: Finished difference. Result has 1147 places, 5347 transitions, 95505 flow [2023-01-28 06:34:51,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=41976, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=441, PETRI_FLOW=95505, PETRI_PLACES=1147, PETRI_TRANSITIONS=5347} [2023-01-28 06:34:51,546 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1113 predicate places. [2023-01-28 06:34:51,546 INFO L495 AbstractCegarLoop]: Abstraction has has 1147 places, 5347 transitions, 95505 flow [2023-01-28 06:34:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 86.77380952380952) internal successors, (7289), 84 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:34:51,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:51,547 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:51,565 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 06:34:51,752 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 06:34:51,752 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:34:51,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1167852704, now seen corresponding path program 3 times [2023-01-28 06:34:51,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:51,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957969916] [2023-01-28 06:34:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 06:34:52,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:52,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957969916] [2023-01-28 06:34:52,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957969916] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:34:52,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807099678] [2023-01-28 06:34:52,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 06:34:52,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:52,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:34:52,053 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 06:34:52,065 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 06:34:52,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-01-28 06:34:52,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:34:52,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 06:34:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:34:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 06:34:52,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:34:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 06:34:52,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807099678] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:34:52,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:34:52,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2023-01-28 06:34:52,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038005845] [2023-01-28 06:34:52,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:34:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 06:34:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 06:34:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-01-28 06:34:52,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 282 [2023-01-28 06:34:52,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1147 places, 5347 transitions, 95505 flow. Second operand has 27 states, 27 states have (on average 121.96296296296296) internal successors, (3293), 27 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:34:52,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:52,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 282 [2023-01-28 06:34:52,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:36:25,045 INFO L130 PetriNetUnfolder]: 52508/100484 cut-off events. [2023-01-28 06:36:25,045 INFO L131 PetriNetUnfolder]: For 1488729/1488729 co-relation queries the response was YES. [2023-01-28 06:36:27,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764696 conditions, 100484 events. 52508/100484 cut-off events. For 1488729/1488729 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 892664 event pairs, 14564 based on Foata normal form. 162/100567 useless extension candidates. Maximal degree in co-relation 762053. Up to 33127 conditions per place. [2023-01-28 06:36:27,871 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 5360 selfloop transitions, 3025 changer transitions 18/8403 dead transitions. [2023-01-28 06:36:27,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1180 places, 8403 transitions, 161210 flow [2023-01-28 06:36:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 06:36:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 06:36:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4350 transitions. [2023-01-28 06:36:27,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45369211514392993 [2023-01-28 06:36:27,874 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4350 transitions. [2023-01-28 06:36:27,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4350 transitions. [2023-01-28 06:36:27,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:36:27,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4350 transitions. [2023-01-28 06:36:27,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 127.94117647058823) internal successors, (4350), 34 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:36:27,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 282.0) internal successors, (9870), 35 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:36:27,882 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 282.0) internal successors, (9870), 35 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:36:27,882 INFO L175 Difference]: Start difference. First operand has 1147 places, 5347 transitions, 95505 flow. Second operand 34 states and 4350 transitions. [2023-01-28 06:36:27,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1180 places, 8403 transitions, 161210 flow [2023-01-28 06:36:53,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 8403 transitions, 155950 flow, removed 2381 selfloop flow, removed 34 redundant places. [2023-01-28 06:36:53,194 INFO L231 Difference]: Finished difference. Result has 1157 places, 6031 transitions, 115286 flow [2023-01-28 06:36:53,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=92089, PETRI_DIFFERENCE_MINUEND_PLACES=1113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=115286, PETRI_PLACES=1157, PETRI_TRANSITIONS=6031} [2023-01-28 06:36:53,198 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1123 predicate places. [2023-01-28 06:36:53,198 INFO L495 AbstractCegarLoop]: Abstraction has has 1157 places, 6031 transitions, 115286 flow [2023-01-28 06:36:53,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 121.96296296296296) internal successors, (3293), 27 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:36:53,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:36:53,199 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:36:53,212 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 06:36:53,413 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 06:36:53,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:36:53,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:36:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash 766933708, now seen corresponding path program 5 times [2023-01-28 06:36:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:36:53,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697060580] [2023-01-28 06:36:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:36:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:36:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:36:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:36:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:36:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697060580] [2023-01-28 06:36:55,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697060580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:36:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076610817] [2023-01-28 06:36:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 06:36:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:36:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:36:55,275 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 06:36:55,276 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 06:36:55,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 06:36:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:36:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-28 06:36:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:36:55,460 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-01-28 06:36:55,461 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-01-28 06:36:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 06:36:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:36:56,502 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 49 treesize of output 36 [2023-01-28 06:36:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:36:56,915 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 49 treesize of output 36 [2023-01-28 06:36:57,009 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 40 treesize of output 36 [2023-01-28 06:36:58,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-01-28 06:36:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:36:58,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:36:59,120 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_962 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_962) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) (- 8))) 4294967296)))) is different from false [2023-01-28 06:37:16,750 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-01-28 06:37:16,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-01-28 06:37:16,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:37:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-01-28 06:37:16,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-01-28 06:37:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 43 refuted. 10 times theorem prover too weak. 1 trivial. 3 not checked. [2023-01-28 06:37:31,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076610817] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:37:31,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:37:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 29] total 92 [2023-01-28 06:37:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913504539] [2023-01-28 06:37:31,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:37:31,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-01-28 06:37:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:37:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-01-28 06:37:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=8073, Unknown=68, NotChecked=182, Total=8742 [2023-01-28 06:37:31,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 282 [2023-01-28 06:37:31,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1157 places, 6031 transitions, 115286 flow. Second operand has 94 states, 94 states have (on average 80.85106382978724) internal successors, (7600), 94 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:37:31,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:37:31,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 282 [2023-01-28 06:37:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 06:39:37,921 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 06:39:37,921 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 06:39:38,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 06:39:39,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-01-28 06:39:39,384 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-28 06:39:39,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 06:39:39,384 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-28 06:39:39,387 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-28 06:39:39,387 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-28 06:39:39,387 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-28 06:39:39,387 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-28 06:39:39,387 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-28 06:39:39,387 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 3, 2, 1, 1, 1, 1] [2023-01-28 06:39:39,402 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 06:39:39,403 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 06:39:39,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 06:39:39 BasicIcfg [2023-01-28 06:39:39,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 06:39:39,408 INFO L158 Benchmark]: Toolchain (without parser) took 816664.42ms. Allocated memory was 373.3MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 306.6MB in the beginning and 7.2GB in the end (delta: -6.9GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-28 06:39:39,408 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 373.3MB. Free memory is still 319.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 06:39:39,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.84ms. Allocated memory is still 373.3MB. Free memory was 306.2MB in the beginning and 277.2MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-01-28 06:39:39,408 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.32ms. Allocated memory is still 373.3MB. Free memory was 277.2MB in the beginning and 274.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:39:39,408 INFO L158 Benchmark]: Boogie Preprocessor took 20.06ms. Allocated memory is still 373.3MB. Free memory was 274.5MB in the beginning and 272.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:39:39,409 INFO L158 Benchmark]: RCFGBuilder took 422.50ms. Allocated memory was 373.3MB in the beginning and 570.4MB in the end (delta: 197.1MB). Free memory was 272.7MB in the beginning and 514.6MB in the end (delta: -241.8MB). Peak memory consumption was 8.2MB. Max. memory is 16.0GB. [2023-01-28 06:39:39,409 INFO L158 Benchmark]: TraceAbstraction took 815803.92ms. Allocated memory was 570.4MB in the beginning and 9.3GB in the end (delta: 8.7GB). Free memory was 514.6MB in the beginning and 7.2GB in the end (delta: -6.7GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-01-28 06:39:39,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 373.3MB. Free memory is still 319.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 381.84ms. Allocated memory is still 373.3MB. Free memory was 306.2MB in the beginning and 277.2MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.32ms. Allocated memory is still 373.3MB. Free memory was 277.2MB in the beginning and 274.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.06ms. Allocated memory is still 373.3MB. Free memory was 274.5MB in the beginning and 272.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 422.50ms. Allocated memory was 373.3MB in the beginning and 570.4MB in the end (delta: 197.1MB). Free memory was 272.7MB in the beginning and 514.6MB in the end (delta: -241.8MB). Peak memory consumption was 8.2MB. Max. memory is 16.0GB. * TraceAbstraction took 815803.92ms. Allocated memory was 570.4MB in the beginning and 9.3GB in the end (delta: 8.7GB). Free memory was 514.6MB in the beginning and 7.2GB in the end (delta: -6.7GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 137 PlacesBefore, 34 PlacesAfterwards, 140 TransitionsBefore, 32 TransitionsAfterwards, 6492 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 26 ConcurrentYvCompositions, 5 ChoiceCompositions, 131 TotalNumberOfCompositions, 8978 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6450, independent: 6265, independent conditional: 0, independent unconditional: 6265, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3562, independent: 3515, independent conditional: 0, independent unconditional: 3515, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6450, independent: 2750, independent conditional: 0, independent unconditional: 2750, dependent: 138, dependent conditional: 0, dependent unconditional: 138, unknown: 3562, unknown conditional: 0, unknown unconditional: 3562] , Statistics on independence cache: Total cache size (in pairs): 142, Positive cache size: 127, Positive conditional cache size: 0, Positive unconditional cache size: 127, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1021]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1022]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 236 locations, 6 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: 815.6s, OverallIterations: 18, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 742.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 476 mSolverCounterUnknown, 19424 SdHoareTripleChecker+Valid, 118.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19424 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 111.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2269 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 2174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82111 IncrementalHoareTripleChecker+Invalid, 87030 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2174 mSolverCounterUnsat, 3 mSDtfsCounter, 82111 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2413 GetRequests, 533 SyntacticMatches, 58 SemanticMatches, 1822 ConstructedPredicates, 3 IntricatePredicates, 7 DeprecatedPredicates, 213467 ImplicationChecksByTransitivity, 390.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115286occurred in iteration=17, InterpolantAutomatonStates: 1167, 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 66.5s InterpolantComputationTime, 947 NumberOfCodeBlocks, 947 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1298 ConstructedInterpolants, 66 QuantifiedInterpolants, 22294 SizeOfPredicates, 240 NumberOfNonLiveVariables, 3622 ConjunctsInSsa, 603 ConjunctsInUnsatCore, 39 InterpolantComputations, 8 PerfectInterpolantSequences, 95/1036 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