./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:21:45,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:21:45,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:21:45,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:21:45,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:21:45,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:21:45,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:21:45,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:21:45,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:21:45,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:21:45,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:21:45,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:21:45,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:21:45,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:21:45,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:21:45,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:21:45,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:21:45,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:21:45,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:21:45,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:21:45,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:21:45,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:21:45,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:21:45,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:21:45,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:21:45,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:21:45,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:21:45,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:21:45,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:21:45,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:21:45,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:21:45,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:21:45,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:21:45,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:21:45,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:21:45,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:21:45,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:21:45,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:21:45,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:21:45,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:21:45,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:21:45,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:21:45,267 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:21:45,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:21:45,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:21:45,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:21:45,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:21:45,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:21:45,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:21:45,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:21:45,270 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:21:45,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:21:45,271 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:21:45,272 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:21:45,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:21:45,273 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:21:45,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:21:45,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:21:45,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:21:45,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:21:45,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:21:45,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:21:45,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:21:45,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:21:45,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:21:45,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:21:45,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:21:45,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:21:45,275 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:21:45,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:21:45,276 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:21:45,276 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:21:45,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:21:45,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:21:45,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:21:45,614 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:21:45,614 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:21:45,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 16:21:46,714 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:21:46,997 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:21:46,997 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 16:21:47,025 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd93b9d0/abf18b1a437b40908ffdade1858f94c3/FLAGb5eec35ca [2023-08-30 16:21:47,036 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd93b9d0/abf18b1a437b40908ffdade1858f94c3 [2023-08-30 16:21:47,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:21:47,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:21:47,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:21:47,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:21:47,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:21:47,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3903152a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47, skipping insertion in model container [2023-08-30 16:21:47,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:21:47,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:21:47,483 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] [2023-08-30 16:21:47,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:21:47,533 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:21:47,577 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] [2023-08-30 16:21:47,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:21:47,659 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:21:47,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47 WrapperNode [2023-08-30 16:21:47,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:21:47,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:21:47,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:21:47,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:21:47,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,722 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-30 16:21:47,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:21:47,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:21:47,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:21:47,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:21:47,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:21:47,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:21:47,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:21:47,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:21:47,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (1/1) ... [2023-08-30 16:21:47,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:21:47,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:47,810 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) [2023-08-30 16:21:47,845 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:21:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:21:47,845 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:21:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:21:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:21:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:21:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:21:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:21:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:21:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:21:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:21:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:21:47,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:21:47,833 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 [2023-08-30 16:21:47,849 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:21:48,065 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:21:48,067 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:21:48,250 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:21:48,257 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:21:48,258 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:21:48,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:48 BoogieIcfgContainer [2023-08-30 16:21:48,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:21:48,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:21:48,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:21:48,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:21:48,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:21:47" (1/3) ... [2023-08-30 16:21:48,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654cafb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:48, skipping insertion in model container [2023-08-30 16:21:48,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:47" (2/3) ... [2023-08-30 16:21:48,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654cafb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:48, skipping insertion in model container [2023-08-30 16:21:48,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:48" (3/3) ... [2023-08-30 16:21:48,267 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-30 16:21:48,276 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:21:48,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:21:48,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 16:21:48,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:21:48,371 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:21:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 318 flow [2023-08-30 16:21:48,515 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-08-30 16:21:48,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:21:48,521 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. [2023-08-30 16:21:48,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 151 transitions, 318 flow [2023-08-30 16:21:48,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 140 transitions, 289 flow [2023-08-30 16:21:48,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:21:48,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-30 16:21:48,561 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-30 16:21:48,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 289 flow [2023-08-30 16:21:48,614 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-08-30 16:21:48,614 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:21:48,617 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. [2023-08-30 16:21:48,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-08-30 16:21:51,997 INFO L134 LiptonReduction]: Checked pairs total: 8978 [2023-08-30 16:21:51,997 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 16:21:52,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:21:52,015 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=true, 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;@30273f4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:21:52,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:21:52,020 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-08-30 16:21:52,020 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:21:52,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:52,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:21:52,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:52,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash 920078475, now seen corresponding path program 1 times [2023-08-30 16:21:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:52,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67622547] [2023-08-30 16:21:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:52,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67622547] [2023-08-30 16:21:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67622547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:52,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:21:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872633001] [2023-08-30 16:21:52,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:52,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-08-30 16:21:52,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:52,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:52,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-08-30 16:21:52,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:52,557 INFO L130 PetriNetUnfolder]: 539/918 cut-off events. [2023-08-30 16:21:52,557 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 16:21:52,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3466 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2023-08-30 16:21:52,564 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 16:21:52,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2023-08-30 16:21:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 16:21:52,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-30 16:21:52,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 16:21:52,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 16:21:52,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:52,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 16:21:52,598 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) [2023-08-30 16:21:52,604 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) [2023-08-30 16:21:52,605 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) [2023-08-30 16:21:52,606 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 450 transitions. [2023-08-30 16:21:52,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2023-08-30 16:21:52,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:21:52,613 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-08-30 16:21:52,615 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} [2023-08-30 16:21:52,619 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 16:21:52,619 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-08-30 16:21:52,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:52,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:52,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:52,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:21:52,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:52,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273937, now seen corresponding path program 1 times [2023-08-30 16:21:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:52,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382181779] [2023-08-30 16:21:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382181779] [2023-08-30 16:21:52,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382181779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:52,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:21:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278562453] [2023-08-30 16:21:52,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:52,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 282 [2023-08-30 16:21:52,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:52,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:52,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 282 [2023-08-30 16:21:52,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:52,912 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-08-30 16:21:52,913 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 16:21:52,914 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. [2023-08-30 16:21:52,918 INFO L137 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-30 16:21:52,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-08-30 16:21:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 16:21:52,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2023-08-30 16:21:52,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 16:21:52,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 16:21:52,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:52,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 16:21:52,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:52,926 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) [2023-08-30 16:21:52,927 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) [2023-08-30 16:21:52,927 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 456 transitions. [2023-08-30 16:21:52,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-08-30 16:21:52,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:52,930 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-08-30 16:21:52,931 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} [2023-08-30 16:21:52,931 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 16:21:52,932 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-08-30 16:21:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:52,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:52,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:52,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:21:52,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:52,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1760034202, now seen corresponding path program 1 times [2023-08-30 16:21:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:52,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796367220] [2023-08-30 16:21:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:52,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:53,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796367220] [2023-08-30 16:21:53,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796367220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:53,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827828139] [2023-08-30 16:21:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:53,035 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) [2023-08-30 16:21:53,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 16:21:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 16:21:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:53,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:21:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827828139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:21:53,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:21:53,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 16:21:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92869083] [2023-08-30 16:21:53,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:21:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:21:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:21:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:21:53,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 282 [2023-08-30 16:21:53,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:53,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:53,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 282 [2023-08-30 16:21:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:53,803 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2023-08-30 16:21:53,803 INFO L131 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2023-08-30 16:21:53,806 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. [2023-08-30 16:21:53,815 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-08-30 16:21:53,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-08-30 16:21:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:21:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:21:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1735 transitions. [2023-08-30 16:21:53,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127068557919622 [2023-08-30 16:21:53,820 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1735 transitions. [2023-08-30 16:21:53,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1735 transitions. [2023-08-30 16:21:53,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:53,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1735 transitions. [2023-08-30 16:21:53,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:53,830 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) [2023-08-30 16:21:53,832 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) [2023-08-30 16:21:53,832 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1735 transitions. [2023-08-30 16:21:53,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-08-30 16:21:53,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:53,838 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-08-30 16:21:53,838 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} [2023-08-30 16:21:53,839 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-30 16:21:53,839 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-08-30 16:21:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:53,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:53,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:53,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 16:21:54,046 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 [2023-08-30 16:21:54,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:54,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121817, now seen corresponding path program 1 times [2023-08-30 16:21:54,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:54,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947636454] [2023-08-30 16:21:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:54,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:54,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:54,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947636454] [2023-08-30 16:21:54,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947636454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:54,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:54,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:21:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312664849] [2023-08-30 16:21:54,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:54,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:54,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 282 [2023-08-30 16:21:54,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:54,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 282 [2023-08-30 16:21:54,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:54,317 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2023-08-30 16:21:54,317 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 16:21:54,319 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. [2023-08-30 16:21:54,323 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-30 16:21:54,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-08-30 16:21:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-30 16:21:54,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236406619385343 [2023-08-30 16:21:54,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-30 16:21:54,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-30 16:21:54,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:54,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-30 16:21:54,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,328 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) [2023-08-30 16:21:54,329 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) [2023-08-30 16:21:54,329 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 443 transitions. [2023-08-30 16:21:54,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-08-30 16:21:54,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 16:21:54,334 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-08-30 16:21:54,334 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} [2023-08-30 16:21:54,335 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-30 16:21:54,335 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-08-30 16:21:54,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:54,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:54,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:21:54,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:54,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1945408692, now seen corresponding path program 1 times [2023-08-30 16:21:54,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:54,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208239058] [2023-08-30 16:21:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:54,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:54,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:54,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208239058] [2023-08-30 16:21:54,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208239058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:54,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:54,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:21:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644602743] [2023-08-30 16:21:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:54,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:54,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-08-30 16:21:54,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:54,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-08-30 16:21:54,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:54,534 INFO L130 PetriNetUnfolder]: 575/1096 cut-off events. [2023-08-30 16:21:54,534 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-08-30 16:21:54,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4650 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2023-08-30 16:21:54,540 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-30 16:21:54,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2023-08-30 16:21:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-30 16:21:54,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2023-08-30 16:21:54,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-30 16:21:54,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-30 16:21:54,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:54,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-30 16:21:54,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,545 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) [2023-08-30 16:21:54,545 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) [2023-08-30 16:21:54,545 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 448 transitions. [2023-08-30 16:21:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2023-08-30 16:21:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:54,549 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-08-30 16:21:54,549 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} [2023-08-30 16:21:54,550 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-30 16:21:54,550 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-08-30 16:21:54,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:54,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:54,551 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] [2023-08-30 16:21:54,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:21:54,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:54,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 498757517, now seen corresponding path program 1 times [2023-08-30 16:21:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700362411] [2023-08-30 16:21:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700362411] [2023-08-30 16:21:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700362411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:55,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:21:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479894123] [2023-08-30 16:21:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:55,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:21:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:21:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:21:55,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-08-30 16:21:55,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:55,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:55,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-08-30 16:21:55,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:56,094 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2023-08-30 16:21:56,094 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2023-08-30 16:21:56,097 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. [2023-08-30 16:21:56,102 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2023-08-30 16:21:56,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2023-08-30 16:21:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:21:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:21:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-08-30 16:21:56,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-08-30 16:21:56,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-08-30 16:21:56,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-08-30 16:21:56,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:56,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-08-30 16:21:56,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:56,113 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) [2023-08-30 16:21:56,113 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) [2023-08-30 16:21:56,113 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1172 transitions. [2023-08-30 16:21:56,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2023-08-30 16:21:56,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 16:21:56,119 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2023-08-30 16:21:56,120 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} [2023-08-30 16:21:56,120 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-08-30 16:21:56,121 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2023-08-30 16:21:56,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:56,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:56,121 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] [2023-08-30 16:21:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:21:56,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:56,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash 858373001, now seen corresponding path program 2 times [2023-08-30 16:21:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47875738] [2023-08-30 16:21:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47875738] [2023-08-30 16:21:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47875738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:21:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616701807] [2023-08-30 16:21:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:21:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:21:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:21:57,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-08-30 16:21:57,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:57,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:57,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-08-30 16:21:57,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:57,992 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2023-08-30 16:21:57,992 INFO L131 PetriNetUnfolder]: For 1260/1260 co-relation queries the response was YES. [2023-08-30 16:21:57,997 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. [2023-08-30 16:21:58,003 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2023-08-30 16:21:58,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2023-08-30 16:21:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:21:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:21:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-08-30 16:21:58,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-08-30 16:21:58,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-08-30 16:21:58,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-08-30 16:21:58,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:58,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-08-30 16:21:58,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:58,014 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) [2023-08-30 16:21:58,015 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) [2023-08-30 16:21:58,015 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1172 transitions. [2023-08-30 16:21:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2023-08-30 16:21:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:21:58,022 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2023-08-30 16:21:58,022 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} [2023-08-30 16:21:58,023 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-08-30 16:21:58,023 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2023-08-30 16:21:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:58,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:58,024 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] [2023-08-30 16:21:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:21:58,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:58,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2064601814, now seen corresponding path program 1 times [2023-08-30 16:21:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:58,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578122996] [2023-08-30 16:21:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:58,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578122996] [2023-08-30 16:21:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578122996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976040298] [2023-08-30 16:21:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:58,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:58,110 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) [2023-08-30 16:21:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 16:21:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 16:21:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:21:58,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 16:21:58,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976040298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:58,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 16:21:58,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-30 16:21:58,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488237936] [2023-08-30 16:21:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:58,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:21:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:21:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:21:58,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-08-30 16:21:58,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:58,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:58,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-08-30 16:21:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:58,622 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2023-08-30 16:21:58,622 INFO L131 PetriNetUnfolder]: For 1999/1999 co-relation queries the response was YES. [2023-08-30 16:21:58,627 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. [2023-08-30 16:21:58,633 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-08-30 16:21:58,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2023-08-30 16:21:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:21:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:21:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2023-08-30 16:21:58,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 16:21:58,637 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2023-08-30 16:21:58,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2023-08-30 16:21:58,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:58,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2023-08-30 16:21:58,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:58,641 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) [2023-08-30 16:21:58,643 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) [2023-08-30 16:21:58,643 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 846 transitions. [2023-08-30 16:21:58,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2023-08-30 16:21:58,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 16:21:58,652 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2023-08-30 16:21:58,653 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} [2023-08-30 16:21:58,655 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-08-30 16:21:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2023-08-30 16:21:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:58,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:21:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:21:58,861 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 [2023-08-30 16:21:58,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:58,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431302, now seen corresponding path program 2 times [2023-08-30 16:21:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649577357] [2023-08-30 16:21:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649577357] [2023-08-30 16:21:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649577357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385900345] [2023-08-30 16:21:59,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:21:59,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:59,082 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) [2023-08-30 16:21:59,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 16:21:59,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:21:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:21:59,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:21:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:59,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:21:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385900345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:21:59,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:21:59,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-08-30 16:21:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496880766] [2023-08-30 16:21:59,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:21:59,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:21:59,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:21:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:21:59,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 282 [2023-08-30 16:21:59,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:59,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:59,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 282 [2023-08-30 16:21:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:00,111 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2023-08-30 16:22:00,111 INFO L131 PetriNetUnfolder]: For 3963/3963 co-relation queries the response was YES. [2023-08-30 16:22:00,121 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. [2023-08-30 16:22:00,132 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2023-08-30 16:22:00,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2023-08-30 16:22:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 16:22:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 16:22:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2886 transitions. [2023-08-30 16:22:00,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48733535967578523 [2023-08-30 16:22:00,139 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2886 transitions. [2023-08-30 16:22:00,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2886 transitions. [2023-08-30 16:22:00,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:00,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2886 transitions. [2023-08-30 16:22:00,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:00,193 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) [2023-08-30 16:22:00,194 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) [2023-08-30 16:22:00,195 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 2886 transitions. [2023-08-30 16:22:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2023-08-30 16:22:00,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 16:22:00,211 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2023-08-30 16:22:00,212 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} [2023-08-30 16:22:00,212 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-08-30 16:22:00,213 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2023-08-30 16:22:00,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:00,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:00,215 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] [2023-08-30 16:22:00,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 16:22:00,421 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 [2023-08-30 16:22:00,421 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:22:00,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 878136134, now seen corresponding path program 3 times [2023-08-30 16:22:00,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:00,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867088925] [2023-08-30 16:22:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:22:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:01,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867088925] [2023-08-30 16:22:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867088925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:01,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 16:22:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656925086] [2023-08-30 16:22:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:22:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:22:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:22:01,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 282 [2023-08-30 16:22:01,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:01,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:01,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 282 [2023-08-30 16:22:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:03,826 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2023-08-30 16:22:03,826 INFO L131 PetriNetUnfolder]: For 9426/9426 co-relation queries the response was YES. [2023-08-30 16:22:03,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16702 conditions, 4959 events. 2655/4959 cut-off events. For 9426/9426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26220 event pairs, 726 based on Foata normal form. 0/4932 useless extension candidates. Maximal degree in co-relation 15140. Up to 1528 conditions per place. [2023-08-30 16:22:03,868 INFO L137 encePairwiseOnDemand]: 264/282 looper letters, 140 selfloop transitions, 131 changer transitions 4/285 dead transitions. [2023-08-30 16:22:03,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 285 transitions, 2535 flow [2023-08-30 16:22:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 16:22:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 16:22:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3156 transitions. [2023-08-30 16:22:03,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144996059889677 [2023-08-30 16:22:03,876 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3156 transitions. [2023-08-30 16:22:03,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3156 transitions. [2023-08-30 16:22:03,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:03,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3156 transitions. [2023-08-30 16:22:03,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.88888888888889) internal successors, (3156), 27 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:03,892 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) [2023-08-30 16:22:03,894 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) [2023-08-30 16:22:03,894 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 3156 transitions. [2023-08-30 16:22:03,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 285 transitions, 2535 flow [2023-08-30 16:22:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 285 transitions, 2320 flow, removed 78 selfloop flow, removed 8 redundant places. [2023-08-30 16:22:03,938 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2023-08-30 16:22:03,938 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} [2023-08-30 16:22:03,939 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-08-30 16:22:03,939 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2023-08-30 16:22:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:03,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:03,940 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] [2023-08-30 16:22:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:22:03,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:22:03,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash -7541718, now seen corresponding path program 4 times [2023-08-30 16:22:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60159988] [2023-08-30 16:22:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:22:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60159988] [2023-08-30 16:22:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60159988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882661165] [2023-08-30 16:22:04,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:22:04,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:04,681 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) [2023-08-30 16:22:04,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 16:22:04,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:22:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 16:22:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:04,843 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 16:22:04,844 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 [2023-08-30 16:22:05,214 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 [2023-08-30 16:22:05,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 16:22:05,810 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 [2023-08-30 16:22:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:06,240 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 [2023-08-30 16:22:06,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:22:06,257 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 [2023-08-30 16:22:06,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:22:06,269 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 [2023-08-30 16:22:06,274 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 [2023-08-30 16:22:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:22:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882661165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:06,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:06,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2023-08-30 16:22:06,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21405920] [2023-08-30 16:22:06,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:06,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 16:22:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 16:22:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1820, Unknown=1, NotChecked=86, Total=2070 [2023-08-30 16:22:06,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 16:22:06,699 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) [2023-08-30 16:22:06,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:06,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 16:22:06,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:14,269 INFO L130 PetriNetUnfolder]: 3584/6680 cut-off events. [2023-08-30 16:22:14,270 INFO L131 PetriNetUnfolder]: For 17054/17054 co-relation queries the response was YES. [2023-08-30 16:22:14,300 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. [2023-08-30 16:22:14,323 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 274 selfloop transitions, 299 changer transitions 15/588 dead transitions. [2023-08-30 16:22:14,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 588 transitions, 5201 flow [2023-08-30 16:22:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 16:22:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 16:22:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6173 transitions. [2023-08-30 16:22:14,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321912807676262 [2023-08-30 16:22:14,338 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6173 transitions. [2023-08-30 16:22:14,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6173 transitions. [2023-08-30 16:22:14,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:14,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6173 transitions. [2023-08-30 16:22:14,349 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) [2023-08-30 16:22:14,370 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) [2023-08-30 16:22:14,375 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) [2023-08-30 16:22:14,375 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 68 states and 6173 transitions. [2023-08-30 16:22:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 588 transitions, 5201 flow [2023-08-30 16:22:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 588 transitions, 4980 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-08-30 16:22:14,482 INFO L231 Difference]: Finished difference. Result has 214 places, 345 transitions, 3990 flow [2023-08-30 16:22:14,482 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} [2023-08-30 16:22:14,482 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 180 predicate places. [2023-08-30 16:22:14,482 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 345 transitions, 3990 flow [2023-08-30 16:22:14,483 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) [2023-08-30 16:22:14,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:14,483 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] [2023-08-30 16:22:14,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 16:22:14,684 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 [2023-08-30 16:22:14,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:22:14,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 366211873, now seen corresponding path program 1 times [2023-08-30 16:22:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:14,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414804008] [2023-08-30 16:22:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414804008] [2023-08-30 16:22:16,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414804008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438553563] [2023-08-30 16:22:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:16,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:16,182 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) [2023-08-30 16:22:16,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 16:22:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:16,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-30 16:22:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:16,558 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 [2023-08-30 16:22:16,951 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 [2023-08-30 16:22:22,046 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-30 16:22:22,047 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 [2023-08-30 16:22:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:22,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:24,651 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 [2023-08-30 16:22:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438553563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:25,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2023-08-30 16:22:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839556874] [2023-08-30 16:22:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:25,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-30 16:22:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-30 16:22:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3924, Unknown=2, NotChecked=0, Total=4290 [2023-08-30 16:22:27,370 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] [2023-08-30 16:22:29,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:31,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:33,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:36,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:38,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:40,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:42,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:44,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:46,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:48,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:50,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:52,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:55,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:55,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-30 16:22:55,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 345 transitions, 3990 flow. Second operand has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:55,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:55,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-30 16:22:55,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:08,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 16:23:10,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 16:23:18,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:26,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:28,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:35,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:23:37,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:23:52,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:08,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:10,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:12,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:13,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:31,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:39,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:41,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:46,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:48,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:24:52,356 INFO L130 PetriNetUnfolder]: 6618/12412 cut-off events. [2023-08-30 16:24:52,356 INFO L131 PetriNetUnfolder]: For 132000/132000 co-relation queries the response was YES. [2023-08-30 16:24:52,463 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. [2023-08-30 16:24:52,586 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 716 selfloop transitions, 448 changer transitions 214/1378 dead transitions. [2023-08-30 16:24:52,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1378 transitions, 16893 flow [2023-08-30 16:24:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-08-30 16:24:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-08-30 16:24:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 15306 transitions. [2023-08-30 16:24:52,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350407144733386 [2023-08-30 16:24:52,637 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 15306 transitions. [2023-08-30 16:24:52,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 15306 transitions. [2023-08-30 16:24:52,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:52,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 15306 transitions. [2023-08-30 16:24:52,696 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) [2023-08-30 16:24:52,806 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) [2023-08-30 16:24:52,833 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) [2023-08-30 16:24:52,834 INFO L175 Difference]: Start difference. First operand has 214 places, 345 transitions, 3990 flow. Second operand 162 states and 15306 transitions. [2023-08-30 16:24:52,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1378 transitions, 16893 flow [2023-08-30 16:24:53,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1378 transitions, 15907 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-08-30 16:24:53,257 INFO L231 Difference]: Finished difference. Result has 389 places, 702 transitions, 8405 flow [2023-08-30 16:24:53,257 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} [2023-08-30 16:24:53,258 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 355 predicate places. [2023-08-30 16:24:53,258 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 702 transitions, 8405 flow [2023-08-30 16:24:53,259 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) [2023-08-30 16:24:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:53,259 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] [2023-08-30 16:24:53,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 16:24:53,465 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 [2023-08-30 16:24:53,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:24:53,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -765198685, now seen corresponding path program 2 times [2023-08-30 16:24:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888869847] [2023-08-30 16:24:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:24:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888869847] [2023-08-30 16:24:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888869847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:24:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996017670] [2023-08-30 16:24:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:24:54,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:24:54,746 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) [2023-08-30 16:24:54,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:24:55,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:24:55,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:24:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-30 16:24:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:24:55,060 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:24:55,060 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 [2023-08-30 16:24:55,237 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 [2023-08-30 16:24:55,287 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 [2023-08-30 16:24:55,611 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-30 16:24:55,611 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 [2023-08-30 16:24:56,120 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 [2023-08-30 16:24:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:24:56,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:24:57,007 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 [2023-08-30 16:24:57,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:24:57,015 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 [2023-08-30 16:24:57,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:24:57,023 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 [2023-08-30 16:24:57,027 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 [2023-08-30 16:24:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:24:57,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996017670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:24:57,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:24:57,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 57 [2023-08-30 16:24:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466072314] [2023-08-30 16:24:57,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:24:57,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 16:24:57,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 16:24:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3106, Unknown=1, NotChecked=112, Total=3422 [2023-08-30 16:24:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 16:24:57,534 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) [2023-08-30 16:24:57,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:57,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 16:24:57,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:39,482 INFO L130 PetriNetUnfolder]: 10002/18954 cut-off events. [2023-08-30 16:25:39,482 INFO L131 PetriNetUnfolder]: For 214834/214834 co-relation queries the response was YES. [2023-08-30 16:25:39,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120628 conditions, 18954 events. 10002/18954 cut-off events. For 214834/214834 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 130454 event pairs, 889 based on Foata normal form. 268/19142 useless extension candidates. Maximal degree in co-relation 117876. Up to 6595 conditions per place. [2023-08-30 16:25:39,820 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 553 selfloop transitions, 1160 changer transitions 111/1824 dead transitions. [2023-08-30 16:25:39,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1824 transitions, 24263 flow [2023-08-30 16:25:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-08-30 16:25:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-08-30 16:25:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 15920 transitions. [2023-08-30 16:25:39,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189485915775133 [2023-08-30 16:25:39,881 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 15920 transitions. [2023-08-30 16:25:39,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 15920 transitions. [2023-08-30 16:25:39,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:39,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 15920 transitions. [2023-08-30 16:25:39,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 89.94350282485875) internal successors, (15920), 177 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:40,064 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) [2023-08-30 16:25:40,091 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) [2023-08-30 16:25:40,091 INFO L175 Difference]: Start difference. First operand has 389 places, 702 transitions, 8405 flow. Second operand 177 states and 15920 transitions. [2023-08-30 16:25:40,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1824 transitions, 24263 flow [2023-08-30 16:25:40,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1824 transitions, 23408 flow, removed 332 selfloop flow, removed 16 redundant places. [2023-08-30 16:25:40,892 INFO L231 Difference]: Finished difference. Result has 547 places, 1257 transitions, 17446 flow [2023-08-30 16:25:40,893 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=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=17446, PETRI_PLACES=547, PETRI_TRANSITIONS=1257} [2023-08-30 16:25:40,893 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 513 predicate places. [2023-08-30 16:25:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1257 transitions, 17446 flow [2023-08-30 16:25:40,895 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) [2023-08-30 16:25:40,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:40,895 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] [2023-08-30 16:25:40,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:25:41,101 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 [2023-08-30 16:25:41,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:25:41,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -620239400, now seen corresponding path program 2 times [2023-08-30 16:25:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454242104] [2023-08-30 16:25:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:41,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454242104] [2023-08-30 16:25:41,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454242104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989673863] [2023-08-30 16:25:41,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:25:41,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:41,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:41,331 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) [2023-08-30 16:25:41,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:25:41,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:25:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:25:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 16:25:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:41,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989673863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:41,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:41,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-30 16:25:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826226137] [2023-08-30 16:25:41,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:25:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:25:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 16:25:41,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 282 [2023-08-30 16:25:41,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1257 transitions, 17446 flow. Second operand has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:41,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 282 [2023-08-30 16:25:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:48,703 INFO L130 PetriNetUnfolder]: 11052/21044 cut-off events. [2023-08-30 16:25:48,703 INFO L131 PetriNetUnfolder]: For 256430/256430 co-relation queries the response was YES. [2023-08-30 16:25:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144446 conditions, 21044 events. 11052/21044 cut-off events. For 256430/256430 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 148547 event pairs, 2635 based on Foata normal form. 108/21128 useless extension candidates. Maximal degree in co-relation 142332. Up to 7187 conditions per place. [2023-08-30 16:25:48,980 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 988 selfloop transitions, 782 changer transitions 12/1782 dead transitions. [2023-08-30 16:25:48,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1782 transitions, 27564 flow [2023-08-30 16:25:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 16:25:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 16:25:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3537 transitions. [2023-08-30 16:25:48,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2023-08-30 16:25:48,987 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3537 transitions. [2023-08-30 16:25:48,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3537 transitions. [2023-08-30 16:25:48,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:48,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3537 transitions. [2023-08-30 16:25:48,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 131.0) internal successors, (3537), 27 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:49,002 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) [2023-08-30 16:25:49,004 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) [2023-08-30 16:25:49,004 INFO L175 Difference]: Start difference. First operand has 547 places, 1257 transitions, 17446 flow. Second operand 27 states and 3537 transitions. [2023-08-30 16:25:49,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1782 transitions, 27564 flow [2023-08-30 16:25:50,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1782 transitions, 25624 flow, removed 825 selfloop flow, removed 22 redundant places. [2023-08-30 16:25:50,223 INFO L231 Difference]: Finished difference. Result has 553 places, 1365 transitions, 20198 flow [2023-08-30 16:25:50,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=15499, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20198, PETRI_PLACES=553, PETRI_TRANSITIONS=1365} [2023-08-30 16:25:50,225 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 519 predicate places. [2023-08-30 16:25:50,225 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1365 transitions, 20198 flow [2023-08-30 16:25:50,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:50,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:50,226 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] [2023-08-30 16:25:50,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 16:25:50,431 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 [2023-08-30 16:25:50,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:25:50,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1841042545, now seen corresponding path program 3 times [2023-08-30 16:25:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563545110] [2023-08-30 16:25:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:25:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563545110] [2023-08-30 16:25:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563545110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019309668] [2023-08-30 16:25:52,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:25:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:52,317 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) [2023-08-30 16:25:52,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:25:52,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:25:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:25:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-30 16:25:52,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:52,748 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 [2023-08-30 16:25:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:25:53,212 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 [2023-08-30 16:25:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:25:53,649 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 [2023-08-30 16:25:54,470 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 [2023-08-30 16:25:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:25:54,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:56,830 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 [2023-08-30 16:25:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:25:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019309668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:57,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:57,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 78 [2023-08-30 16:25:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749679911] [2023-08-30 16:25:57,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-08-30 16:25:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-08-30 16:25:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5876, Unknown=0, NotChecked=0, Total=6162 [2023-08-30 16:26:10,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 282 [2023-08-30 16:26:10,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1365 transitions, 20198 flow. Second operand has 79 states, 79 states have (on average 106.9367088607595) internal successors, (8448), 79 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:26:10,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:10,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 282 [2023-08-30 16:26:10,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:13,035 INFO L130 PetriNetUnfolder]: 22469/42931 cut-off events. [2023-08-30 16:27:13,036 INFO L131 PetriNetUnfolder]: For 538565/538565 co-relation queries the response was YES. [2023-08-30 16:27:13,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297427 conditions, 42931 events. 22469/42931 cut-off events. For 538565/538565 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 338982 event pairs, 2903 based on Foata normal form. 330/43219 useless extension candidates. Maximal degree in co-relation 295016. Up to 14322 conditions per place. [2023-08-30 16:27:14,100 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 821 selfloop transitions, 2499 changer transitions 108/3428 dead transitions. [2023-08-30 16:27:14,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 3428 transitions, 55236 flow [2023-08-30 16:27:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-08-30 16:27:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-08-30 16:27:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 17833 transitions. [2023-08-30 16:27:14,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035548550914984 [2023-08-30 16:27:14,120 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 17833 transitions. [2023-08-30 16:27:14,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 17833 transitions. [2023-08-30 16:27:14,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:14,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 17833 transitions. [2023-08-30 16:27:14,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 110.08024691358025) internal successors, (17833), 162 states have internal predecessors, (17833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:27:14,187 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) [2023-08-30 16:27:14,195 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) [2023-08-30 16:27:14,195 INFO L175 Difference]: Start difference. First operand has 553 places, 1365 transitions, 20198 flow. Second operand 162 states and 17833 transitions. [2023-08-30 16:27:14,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 3428 transitions, 55236 flow [2023-08-30 16:27:17,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 3428 transitions, 52972 flow, removed 591 selfloop flow, removed 11 redundant places. [2023-08-30 16:27:17,557 INFO L231 Difference]: Finished difference. Result has 721 places, 2718 transitions, 45524 flow [2023-08-30 16:27:17,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=19183, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=45524, PETRI_PLACES=721, PETRI_TRANSITIONS=2718} [2023-08-30 16:27:17,559 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 687 predicate places. [2023-08-30 16:27:17,559 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 2718 transitions, 45524 flow [2023-08-30 16:27:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 106.9367088607595) internal successors, (8448), 79 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:27:17,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:17,560 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] [2023-08-30 16:27:17,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 16:27:17,765 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 [2023-08-30 16:27:17,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:27:17,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash -809020241, now seen corresponding path program 4 times [2023-08-30 16:27:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347749829] [2023-08-30 16:27:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:19,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:19,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347749829] [2023-08-30 16:27:19,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347749829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:27:19,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770118640] [2023-08-30 16:27:19,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:27:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:27:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:27:19,930 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) [2023-08-30 16:27:19,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 16:27:20,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:27:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:27:20,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 114 conjunts are in the unsatisfiable core [2023-08-30 16:27:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:27:20,074 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:27:20,074 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 [2023-08-30 16:27:20,227 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 [2023-08-30 16:27:20,279 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 [2023-08-30 16:27:20,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:27:20,615 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 [2023-08-30 16:27:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:27:20,894 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 [2023-08-30 16:27:21,598 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 [2023-08-30 16:27:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:21,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:27:25,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:25,376 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 [2023-08-30 16:27:25,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:25,383 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 [2023-08-30 16:27:25,387 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 [2023-08-30 16:27:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770118640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:27:25,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:27:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 26] total 82 [2023-08-30 16:27:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642638809] [2023-08-30 16:27:25,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:27:25,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-08-30 16:27:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-08-30 16:27:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=6572, Unknown=6, NotChecked=0, Total=6972 [2023-08-30 16:27:35,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 282 [2023-08-30 16:27:35,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 2718 transitions, 45524 flow. Second operand has 84 states, 84 states have (on average 89.77380952380952) internal successors, (7541), 84 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:27:35,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:35,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 282 [2023-08-30 16:27:35,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:30,448 INFO L130 PetriNetUnfolder]: 30244/57876 cut-off events. [2023-08-30 16:29:30,448 INFO L131 PetriNetUnfolder]: For 779260/779260 co-relation queries the response was YES. [2023-08-30 16:29:31,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421102 conditions, 57876 events. 30244/57876 cut-off events. For 779260/779260 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 483378 event pairs, 2873 based on Foata normal form. 436/58247 useless extension candidates. Maximal degree in co-relation 418558. Up to 19343 conditions per place. [2023-08-30 16:29:32,139 INFO L137 encePairwiseOnDemand]: 262/282 looper letters, 739 selfloop transitions, 3652 changer transitions 160/4551 dead transitions. [2023-08-30 16:29:32,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 929 places, 4551 transitions, 80476 flow [2023-08-30 16:29:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2023-08-30 16:29:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2023-08-30 16:29:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 19403 transitions. [2023-08-30 16:29:32,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32921035664596693 [2023-08-30 16:29:32,158 INFO L72 ComplementDD]: Start complementDD. Operand 209 states and 19403 transitions. [2023-08-30 16:29:32,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 209 states and 19403 transitions. [2023-08-30 16:29:32,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:32,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 209 states and 19403 transitions. [2023-08-30 16:29:32,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 210 states, 209 states have (on average 92.83732057416267) internal successors, (19403), 209 states have internal predecessors, (19403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:32,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 210 states, 210 states have (on average 282.0) internal successors, (59220), 210 states have internal predecessors, (59220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:32,239 INFO L81 ComplementDD]: Finished complementDD. Result has 210 states, 210 states have (on average 282.0) internal successors, (59220), 210 states have internal predecessors, (59220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:32,239 INFO L175 Difference]: Start difference. First operand has 721 places, 2718 transitions, 45524 flow. Second operand 209 states and 19403 transitions. [2023-08-30 16:29:32,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 929 places, 4551 transitions, 80476 flow [2023-08-30 16:29:39,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 892 places, 4551 transitions, 75567 flow, removed 561 selfloop flow, removed 37 redundant places. [2023-08-30 16:29:39,550 INFO L231 Difference]: Finished difference. Result has 918 places, 3826 transitions, 67900 flow [2023-08-30 16:29:39,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=40742, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=209, PETRI_FLOW=67900, PETRI_PLACES=918, PETRI_TRANSITIONS=3826} [2023-08-30 16:29:39,553 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 884 predicate places. [2023-08-30 16:29:39,554 INFO L495 AbstractCegarLoop]: Abstraction has has 918 places, 3826 transitions, 67900 flow [2023-08-30 16:29:39,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 89.77380952380952) internal successors, (7541), 84 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:29:39,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:39,555 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] [2023-08-30 16:29:39,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 16:29:39,761 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 [2023-08-30 16:29:39,761 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:29:39,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash 391670983, now seen corresponding path program 5 times [2023-08-30 16:29:39,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:39,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250315321] [2023-08-30 16:29:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250315321] [2023-08-30 16:29:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250315321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:29:42,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861712756] [2023-08-30 16:29:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:29:42,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:29:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:42,338 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) [2023-08-30 16:29:42,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 16:29:42,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 16:29:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:29:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 112 conjunts are in the unsatisfiable core [2023-08-30 16:29:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:29:42,498 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 16:29:42,498 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 20 treesize of output 22 [2023-08-30 16:29:42,709 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 [2023-08-30 16:29:43,115 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 45 treesize of output 32 [2023-08-30 16:29:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:29:43,572 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 [2023-08-30 16:29:43,659 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 [2023-08-30 16:29:44,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-30 16:29:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:44,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:29:45,552 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_851 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_851) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) (- 8))) 4294967296)))) is different from false [2023-08-30 16:30:06,281 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-30 16:30:06,282 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 [2023-08-30 16:30:06,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:06,293 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 [2023-08-30 16:30:06,298 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 [2023-08-30 16:30:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 16:30:20,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861712756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:30:20,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:30:20,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 29, 29] total 94 [2023-08-30 16:30:20,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881955893] [2023-08-30 16:30:20,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:30:20,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-08-30 16:30:20,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-08-30 16:30:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=8301, Unknown=56, NotChecked=186, Total=9120 [2023-08-30 16:30:20,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 16:30:20,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 3826 transitions, 67900 flow. Second operand has 96 states, 96 states have (on average 86.5625) internal successors, (8310), 96 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:30:20,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:20,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 16:30:20,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:31:40,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:34:02,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:34:22,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:34:30,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:34:53,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15