./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:51:38,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:51:38,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:51:38,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:51:38,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:51:38,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:51:38,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:51:38,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:51:38,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:51:38,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:51:38,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:51:38,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:51:38,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:51:38,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:51:38,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:51:38,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:51:38,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:51:38,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:51:38,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:51:38,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:51:38,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:51:38,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:51:38,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:51:38,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:51:38,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:51:38,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:51:38,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:51:38,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:51:38,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:51:38,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:51:38,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:51:38,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:51:38,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:51:38,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:51:38,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:51:38,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:51:38,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:51:38,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:51:38,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:51:38,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:51:38,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:51:38,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 08:51:38,247 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:51:38,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:51:38,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:51:38,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:51:38,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:51:38,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:51:38,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:51:38,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:51:38,250 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:51:38,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:51:38,251 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:51:38,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:51:38,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:51:38,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:51:38,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:51:38,254 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:51:38,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:51:38,254 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:51:38,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:51:38,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:51:38,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:51:38,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:51:38,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:51:38,535 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:51:38,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2023-09-01 08:51:39,602 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:51:39,835 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:51:39,835 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2023-09-01 08:51:39,859 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e23f536/2feca02aacb747bf8379de31217d491c/FLAGfba2f1e03 [2023-09-01 08:51:39,872 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e23f536/2feca02aacb747bf8379de31217d491c [2023-09-01 08:51:39,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:51:39,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:51:39,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:51:39,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:51:39,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:51:39,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:51:39" (1/1) ... [2023-09-01 08:51:39,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2290f26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:39, skipping insertion in model container [2023-09-01 08:51:39,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:51:39" (1/1) ... [2023-09-01 08:51:39,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:51:39,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:51:40,213 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-1.i[41520,41533] [2023-09-01 08:51:40,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:51:40,253 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:51:40,288 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-1.i[41520,41533] [2023-09-01 08:51:40,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:51:40,338 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:51:40,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40 WrapperNode [2023-09-01 08:51:40,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:51:40,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:51:40,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:51:40,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:51:40,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,370 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 153 [2023-09-01 08:51:40,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:51:40,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:51:40,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:51:40,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:51:40,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:51:40,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:51:40,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:51:40,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:51:40,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (1/1) ... [2023-09-01 08:51:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:51:40,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:51:40,423 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) [2023-09-01 08:51:40,430 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 [2023-09-01 08:51:40,448 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 08:51:40,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 08:51:40,449 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:51:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 08:51:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:51:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:51:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:51:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:51:40,451 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:51:40,545 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:51:40,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:51:40,810 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:51:40,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:51:40,820 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:51:40,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:51:40 BoogieIcfgContainer [2023-09-01 08:51:40,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:51:40,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:51:40,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:51:40,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:51:40,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:51:39" (1/3) ... [2023-09-01 08:51:40,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b2b37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:51:40, skipping insertion in model container [2023-09-01 08:51:40,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:51:40" (2/3) ... [2023-09-01 08:51:40,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b2b37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:51:40, skipping insertion in model container [2023-09-01 08:51:40,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:51:40" (3/3) ... [2023-09-01 08:51:40,836 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2023-09-01 08:51:40,840 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:51:40,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:51:40,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 08:51:40,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:51:40,950 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:51:40,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 155 transitions, 326 flow [2023-09-01 08:51:41,067 INFO L130 PetriNetUnfolder]: 10/153 cut-off events. [2023-09-01 08:51:41,068 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:51:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 10/153 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. 0/141 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-09-01 08:51:41,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 155 transitions, 326 flow [2023-09-01 08:51:41,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 144 transitions, 297 flow [2023-09-01 08:51:41,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:51:41,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 144 transitions, 297 flow [2023-09-01 08:51:41,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 144 transitions, 297 flow [2023-09-01 08:51:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 144 transitions, 297 flow [2023-09-01 08:51:41,137 INFO L130 PetriNetUnfolder]: 10/144 cut-off events. [2023-09-01 08:51:41,138 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:51:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 144 events. 10/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 309 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-09-01 08:51:41,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-09-01 08:51:44,125 INFO L134 LiptonReduction]: Checked pairs total: 8991 [2023-09-01 08:51:44,125 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-09-01 08:51:44,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:51:44,138 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;@2e6b14ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:51:44,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-09-01 08:51:44,140 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-09-01 08:51:44,140 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:51:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:51:44,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:44,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1268975004, now seen corresponding path program 1 times [2023-09-01 08:51:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793844681] [2023-09-01 08:51:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793844681] [2023-09-01 08:51:44,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793844681] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:44,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:44,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:51:44,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125349728] [2023-09-01 08:51:44,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:44,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:51:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:51:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:51:44,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-09-01 08:51:44,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 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) [2023-09-01 08:51:44,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:44,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-09-01 08:51:44,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:44,603 INFO L130 PetriNetUnfolder]: 568/973 cut-off events. [2023-09-01 08:51:44,604 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-09-01 08:51:44,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 973 events. 568/973 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3785 event pairs, 234 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 1776. Up to 575 conditions per place. [2023-09-01 08:51:44,612 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 47 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-09-01 08:51:44,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 52 transitions, 219 flow [2023-09-01 08:51:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:51:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:51:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-09-01 08:51:44,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532183908045977 [2023-09-01 08:51:44,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-09-01 08:51:44,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-09-01 08:51:44,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:44,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-09-01 08:51:44,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,645 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 463 transitions. [2023-09-01 08:51:44,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 52 transitions, 219 flow [2023-09-01 08:51:44,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:51:44,649 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-09-01 08:51:44,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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} [2023-09-01 08:51:44,653 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-09-01 08:51:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-09-01 08:51:44,654 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) [2023-09-01 08:51:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:44,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:51:44,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:51:44,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:44,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -575844582, now seen corresponding path program 1 times [2023-09-01 08:51:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612459604] [2023-09-01 08:51:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612459604] [2023-09-01 08:51:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612459604] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:44,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:51:44,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644911738] [2023-09-01 08:51:44,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:51:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:51:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:51:44,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 290 [2023-09-01 08:51:44,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:44,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 290 [2023-09-01 08:51:44,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:44,882 INFO L130 PetriNetUnfolder]: 625/1064 cut-off events. [2023-09-01 08:51:44,883 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 08:51:44,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1064 events. 625/1064 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4657 event pairs, 314 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2008. Up to 926 conditions per place. [2023-09-01 08:51:44,886 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 08:51:44,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-09-01 08:51:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:51:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:51:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-09-01 08:51:44,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2023-09-01 08:51:44,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-09-01 08:51:44,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-09-01 08:51:44,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:44,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-09-01 08:51:44,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,892 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 468 transitions. [2023-09-01 08:51:44,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-09-01 08:51:44,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:51:44,893 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-09-01 08:51:44,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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} [2023-09-01 08:51:44,894 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-09-01 08:51:44,894 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-09-01 08:51:44,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:44,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:44,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:51:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:51:44,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:44,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -884871179, now seen corresponding path program 1 times [2023-09-01 08:51:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739968542] [2023-09-01 08:51:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:45,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:45,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739968542] [2023-09-01 08:51:45,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739968542] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:51:45,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316842516] [2023-09-01 08:51:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:45,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:51:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:51:45,011 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) [2023-09-01 08:51:45,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:51:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:51:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:51:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:45,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:51:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316842516] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:51:45,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:51:45,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-09-01 08:51:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826375616] [2023-09-01 08:51:45,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:51:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 08:51:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 08:51:45,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:51:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 290 [2023-09-01 08:51:45,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 136.4) internal successors, (1364), 10 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:45,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 290 [2023-09-01 08:51:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:45,618 INFO L130 PetriNetUnfolder]: 1530/2543 cut-off events. [2023-09-01 08:51:45,618 INFO L131 PetriNetUnfolder]: For 791/791 co-relation queries the response was YES. [2023-09-01 08:51:45,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2543 events. 1530/2543 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11709 event pairs, 226 based on Foata normal form. 78/2284 useless extension candidates. Maximal degree in co-relation 5392. Up to 737 conditions per place. [2023-09-01 08:51:45,627 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 150 selfloop transitions, 26 changer transitions 3/180 dead transitions. [2023-09-01 08:51:45,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 180 transitions, 837 flow [2023-09-01 08:51:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:51:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:51:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1778 transitions. [2023-09-01 08:51:45,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109195402298851 [2023-09-01 08:51:45,631 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1778 transitions. [2023-09-01 08:51:45,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1778 transitions. [2023-09-01 08:51:45,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:45,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1778 transitions. [2023-09-01 08:51:45,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 148.16666666666666) internal successors, (1778), 12 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,640 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,640 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1778 transitions. [2023-09-01 08:51:45,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 180 transitions, 837 flow [2023-09-01 08:51:45,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 180 transitions, 822 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:51:45,647 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-09-01 08:51:45,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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} [2023-09-01 08:51:45,649 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-09-01 08:51:45,649 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-09-01 08:51:45,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.4) internal successors, (1364), 10 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:45,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:51:45,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 08:51:45,861 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 [2023-09-01 08:51:45,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:45,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2024911666, now seen corresponding path program 1 times [2023-09-01 08:51:45,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339590594] [2023-09-01 08:51:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:45,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:45,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339590594] [2023-09-01 08:51:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339590594] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:45,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:45,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 08:51:45,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421449610] [2023-09-01 08:51:45,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:45,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:51:45,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:51:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:51:45,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-09-01 08:51:45,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:45,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:45,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-09-01 08:51:45,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:46,077 INFO L130 PetriNetUnfolder]: 509/974 cut-off events. [2023-09-01 08:51:46,078 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-09-01 08:51:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 974 events. 509/974 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4145 event pairs, 98 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2336. Up to 681 conditions per place. [2023-09-01 08:51:46,081 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 45 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-09-01 08:51:46,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 348 flow [2023-09-01 08:51:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:51:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:51:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-09-01 08:51:46,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2023-09-01 08:51:46,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-09-01 08:51:46,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-09-01 08:51:46,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:46,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-09-01 08:51:46,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,085 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 455 transitions. [2023-09-01 08:51:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 348 flow [2023-09-01 08:51:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 327 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 08:51:46,089 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-09-01 08:51:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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} [2023-09-01 08:51:46,090 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-09-01 08:51:46,090 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-09-01 08:51:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:46,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:51:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:51:46,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:46,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2104323153, now seen corresponding path program 1 times [2023-09-01 08:51:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:46,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237109524] [2023-09-01 08:51:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237109524] [2023-09-01 08:51:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237109524] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:46,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 08:51:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619867063] [2023-09-01 08:51:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:46,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:51:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:51:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:51:46,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-09-01 08:51:46,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:46,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-09-01 08:51:46,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:46,228 INFO L130 PetriNetUnfolder]: 557/1078 cut-off events. [2023-09-01 08:51:46,228 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-09-01 08:51:46,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 1078 events. 557/1078 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4630 event pairs, 353 based on Foata normal form. 24/1102 useless extension candidates. Maximal degree in co-relation 2216. Up to 773 conditions per place. [2023-09-01 08:51:46,232 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 49 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-09-01 08:51:46,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 365 flow [2023-09-01 08:51:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:51:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:51:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-09-01 08:51:46,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275862068965518 [2023-09-01 08:51:46,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-09-01 08:51:46,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-09-01 08:51:46,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:46,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-09-01 08:51:46,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,236 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 459 transitions. [2023-09-01 08:51:46,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 365 flow [2023-09-01 08:51:46,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:51:46,238 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-09-01 08:51:46,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, 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} [2023-09-01 08:51:46,239 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-09-01 08:51:46,239 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-09-01 08:51:46,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:46,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:46,240 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] [2023-09-01 08:51:46,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:51:46,240 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:46,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1299614568, now seen corresponding path program 1 times [2023-09-01 08:51:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147371724] [2023-09-01 08:51:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147371724] [2023-09-01 08:51:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147371724] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:46,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-09-01 08:51:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615671095] [2023-09-01 08:51:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:51:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:51:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:51:47,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-09-01 08:51:47,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 15 states, 15 states have (on average 111.4) internal successors, (1671), 15 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:47,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:47,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-09-01 08:51:47,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:48,772 INFO L130 PetriNetUnfolder]: 930/1729 cut-off events. [2023-09-01 08:51:48,773 INFO L131 PetriNetUnfolder]: For 1197/1197 co-relation queries the response was YES. [2023-09-01 08:51:48,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4454 conditions, 1729 events. 930/1729 cut-off events. For 1197/1197 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7889 event pairs, 174 based on Foata normal form. 32/1747 useless extension candidates. Maximal degree in co-relation 2915. Up to 973 conditions per place. [2023-09-01 08:51:48,778 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 111 selfloop transitions, 38 changer transitions 30/179 dead transitions. [2023-09-01 08:51:48,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 179 transitions, 984 flow [2023-09-01 08:51:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:51:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:51:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2806 transitions. [2023-09-01 08:51:48,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40316091954022987 [2023-09-01 08:51:48,783 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2806 transitions. [2023-09-01 08:51:48,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2806 transitions. [2023-09-01 08:51:48,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:48,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2806 transitions. [2023-09-01 08:51:48,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 116.91666666666667) internal successors, (2806), 24 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:48,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:48,802 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:48,802 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 24 states and 2806 transitions. [2023-09-01 08:51:48,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 179 transitions, 984 flow [2023-09-01 08:51:48,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 954 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 08:51:48,809 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 542 flow [2023-09-01 08:51:48,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=542, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-09-01 08:51:48,811 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-09-01 08:51:48,812 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 542 flow [2023-09-01 08:51:48,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 111.4) internal successors, (1671), 15 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:48,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:48,814 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] [2023-09-01 08:51:48,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:51:48,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:48,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1750382990, now seen corresponding path program 2 times [2023-09-01 08:51:48,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:48,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181994322] [2023-09-01 08:51:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:48,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:49,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181994322] [2023-09-01 08:51:49,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181994322] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:49,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:49,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 08:51:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566256196] [2023-09-01 08:51:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:49,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:51:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:51:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:51:50,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 290 [2023-09-01 08:51:50,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 542 flow. Second operand has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:50,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:50,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 290 [2023-09-01 08:51:50,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:51,740 INFO L130 PetriNetUnfolder]: 1208/2259 cut-off events. [2023-09-01 08:51:51,740 INFO L131 PetriNetUnfolder]: For 2489/2489 co-relation queries the response was YES. [2023-09-01 08:51:51,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2259 events. 1208/2259 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10806 event pairs, 374 based on Foata normal form. 16/2261 useless extension candidates. Maximal degree in co-relation 5574. Up to 1405 conditions per place. [2023-09-01 08:51:51,750 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 117 selfloop transitions, 32 changer transitions 23/172 dead transitions. [2023-09-01 08:51:51,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1221 flow [2023-09-01 08:51:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:51:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:51:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1623 transitions. [2023-09-01 08:51:51,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997536945812808 [2023-09-01 08:51:51,754 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1623 transitions. [2023-09-01 08:51:51,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1623 transitions. [2023-09-01 08:51:51,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:51,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1623 transitions. [2023-09-01 08:51:51,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:51,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:51,762 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:51,762 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 542 flow. Second operand 14 states and 1623 transitions. [2023-09-01 08:51:51,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1221 flow [2023-09-01 08:51:51,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1209 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-09-01 08:51:51,772 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 756 flow [2023-09-01 08:51:51,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2023-09-01 08:51:51,773 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 74 predicate places. [2023-09-01 08:51:51,773 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 756 flow [2023-09-01 08:51:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:51,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:51,774 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] [2023-09-01 08:51:51,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:51:51,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:51,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash 954194670, now seen corresponding path program 3 times [2023-09-01 08:51:51,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:51,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143164353] [2023-09-01 08:51:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143164353] [2023-09-01 08:51:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143164353] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:51:52,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:51:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 08:51:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563914676] [2023-09-01 08:51:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:51:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:51:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:51:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:51:53,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 290 [2023-09-01 08:51:53,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 756 flow. Second operand has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:53,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:53,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 290 [2023-09-01 08:51:53,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:54,573 INFO L130 PetriNetUnfolder]: 1356/2543 cut-off events. [2023-09-01 08:51:54,573 INFO L131 PetriNetUnfolder]: For 3554/3554 co-relation queries the response was YES. [2023-09-01 08:51:54,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8329 conditions, 2543 events. 1356/2543 cut-off events. For 3554/3554 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12525 event pairs, 371 based on Foata normal form. 16/2545 useless extension candidates. Maximal degree in co-relation 6506. Up to 1368 conditions per place. [2023-09-01 08:51:54,584 INFO L137 encePairwiseOnDemand]: 273/290 looper letters, 117 selfloop transitions, 40 changer transitions 24/181 dead transitions. [2023-09-01 08:51:54,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1431 flow [2023-09-01 08:51:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:51:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:51:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1623 transitions. [2023-09-01 08:51:54,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997536945812808 [2023-09-01 08:51:54,588 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1623 transitions. [2023-09-01 08:51:54,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1623 transitions. [2023-09-01 08:51:54,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:54,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1623 transitions. [2023-09-01 08:51:54,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:54,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:54,595 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:54,595 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 756 flow. Second operand 14 states and 1623 transitions. [2023-09-01 08:51:54,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1431 flow [2023-09-01 08:51:54,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1403 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-09-01 08:51:54,609 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 951 flow [2023-09-01 08:51:54,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=951, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2023-09-01 08:51:54,611 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-09-01 08:51:54,611 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 951 flow [2023-09-01 08:51:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:54,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:54,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 08:51:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 08:51:54,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:54,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1380599275, now seen corresponding path program 2 times [2023-09-01 08:51:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:54,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859218791] [2023-09-01 08:51:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:54,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:54,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859218791] [2023-09-01 08:51:54,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859218791] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:51:54,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371861936] [2023-09-01 08:51:54,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:51:54,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:51:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:51:54,775 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) [2023-09-01 08:51:54,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:51:54,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:51:54,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:51:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:51:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:51:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:51:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371861936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:51:54,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:51:54,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-09-01 08:51:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006925452] [2023-09-01 08:51:54,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:51:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:51:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:51:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:51:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:51:55,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 290 [2023-09-01 08:51:55,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 951 flow. Second operand has 15 states, 15 states have (on average 133.4) internal successors, (2001), 15 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:55,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:51:55,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 290 [2023-09-01 08:51:55,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:51:55,502 INFO L130 PetriNetUnfolder]: 1520/2891 cut-off events. [2023-09-01 08:51:55,502 INFO L131 PetriNetUnfolder]: For 6091/6091 co-relation queries the response was YES. [2023-09-01 08:51:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 2891 events. 1520/2891 cut-off events. For 6091/6091 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14455 event pairs, 386 based on Foata normal form. 16/2891 useless extension candidates. Maximal degree in co-relation 7162. Up to 978 conditions per place. [2023-09-01 08:51:55,517 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 188 selfloop transitions, 48 changer transitions 6/247 dead transitions. [2023-09-01 08:51:55,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 247 transitions, 2110 flow [2023-09-01 08:51:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 08:51:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 08:51:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2391 transitions. [2023-09-01 08:51:55,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48498985801217037 [2023-09-01 08:51:55,522 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2391 transitions. [2023-09-01 08:51:55,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2391 transitions. [2023-09-01 08:51:55,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:51:55,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2391 transitions. [2023-09-01 08:51:55,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 140.64705882352942) internal successors, (2391), 17 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:55,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:55,533 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:55,533 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 951 flow. Second operand 17 states and 2391 transitions. [2023-09-01 08:51:55,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 247 transitions, 2110 flow [2023-09-01 08:51:55,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 247 transitions, 2047 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-09-01 08:51:55,556 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 1259 flow [2023-09-01 08:51:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1259, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2023-09-01 08:51:55,557 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 107 predicate places. [2023-09-01 08:51:55,557 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 1259 flow [2023-09-01 08:51:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.4) internal successors, (2001), 15 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:51:55,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:51:55,567 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] [2023-09-01 08:51:55,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:51:55,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-09-01 08:51:55,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:51:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:51:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash 934646639, now seen corresponding path program 4 times [2023-09-01 08:51:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:51:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964607970] [2023-09-01 08:51:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:51:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:51:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:51:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:51:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964607970] [2023-09-01 08:51:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964607970] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:51:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565261463] [2023-09-01 08:51:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:51:56,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:51:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:51:56,322 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) [2023-09-01 08:51:56,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:51:56,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:51:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:51:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 08:51:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:51:56,732 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 18 treesize of output 13 [2023-09-01 08:51:57,122 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 78 treesize of output 45 [2023-09-01 08:51:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:51:59,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:52:00,077 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 [2023-09-01 08:52:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:52:00,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565261463] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:52:00,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:52:00,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15, 15] total 43 [2023-09-01 08:52:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375089336] [2023-09-01 08:52:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:52:00,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 08:52:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:52:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 08:52:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1750, Unknown=1, NotChecked=0, Total=1892 [2023-09-01 08:52:01,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 290 [2023-09-01 08:52:01,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 1259 flow. Second operand has 14 states, 14 states have (on average 117.0) internal successors, (1638), 14 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:01,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:52:01,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 290 [2023-09-01 08:52:01,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:52:04,355 INFO L130 PetriNetUnfolder]: 2832/5250 cut-off events. [2023-09-01 08:52:04,368 INFO L131 PetriNetUnfolder]: For 14501/14501 co-relation queries the response was YES. [2023-09-01 08:52:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19586 conditions, 5250 events. 2832/5250 cut-off events. For 14501/14501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 29424 event pairs, 686 based on Foata normal form. 0/5221 useless extension candidates. Maximal degree in co-relation 14314. Up to 1634 conditions per place. [2023-09-01 08:52:04,420 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 194 selfloop transitions, 140 changer transitions 4/338 dead transitions. [2023-09-01 08:52:04,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 338 transitions, 3324 flow [2023-09-01 08:52:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 08:52:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 08:52:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3408 transitions. [2023-09-01 08:52:04,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41970443349753694 [2023-09-01 08:52:04,484 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3408 transitions. [2023-09-01 08:52:04,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3408 transitions. [2023-09-01 08:52:04,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:52:04,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3408 transitions. [2023-09-01 08:52:04,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 121.71428571428571) internal successors, (3408), 28 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:04,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:04,499 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:04,499 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 1259 flow. Second operand 28 states and 3408 transitions. [2023-09-01 08:52:04,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 338 transitions, 3324 flow [2023-09-01 08:52:04,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 338 transitions, 3094 flow, removed 73 selfloop flow, removed 8 redundant places. [2023-09-01 08:52:04,553 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2262 flow [2023-09-01 08:52:04,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2262, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2023-09-01 08:52:04,554 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 133 predicate places. [2023-09-01 08:52:04,554 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2262 flow [2023-09-01 08:52:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.0) internal successors, (1638), 14 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:04,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:52:04,555 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] [2023-09-01 08:52:04,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:52:04,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:52:04,761 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:52:04,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:52:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1979329675, now seen corresponding path program 5 times [2023-09-01 08:52:04,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:52:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760824666] [2023-09-01 08:52:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:52:04,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:52:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:52:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:52:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:52:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760824666] [2023-09-01 08:52:05,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760824666] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:52:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402699421] [2023-09-01 08:52:05,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:52:05,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:52:05,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:52:05,526 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) [2023-09-01 08:52:05,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:52:05,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:52:05,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:52:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 71 conjunts are in the unsatisfiable core [2023-09-01 08:52:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:52:05,633 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-09-01 08:52:05,634 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 [2023-09-01 08:52:05,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-09-01 08:52:06,178 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 43 treesize of output 38 [2023-09-01 08:52:06,544 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 78 treesize of output 45 [2023-09-01 08:52:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:52:08,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:52:09,236 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-09-01 08:52:09,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:52:09,304 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 [2023-09-01 08:52:09,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:52:09,318 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 [2023-09-01 08:52:09,321 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 [2023-09-01 08:52:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 08:52:09,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402699421] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:52:09,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:52:09,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2023-09-01 08:52:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624732302] [2023-09-01 08:52:09,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:52:09,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 08:52:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:52:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 08:52:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1971, Unknown=16, NotChecked=90, Total=2256 [2023-09-01 08:52:09,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-09-01 08:52:09,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2262 flow. Second operand has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:09,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:52:09,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-09-01 08:52:09,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:52:15,244 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] [2023-09-01 08:52:17,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:52:20,085 WARN L539 Checker$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] [2023-09-01 08:52:36,722 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] [2023-09-01 08:52:37,619 INFO L130 PetriNetUnfolder]: 6723/12835 cut-off events. [2023-09-01 08:52:37,619 INFO L131 PetriNetUnfolder]: For 50317/50317 co-relation queries the response was YES. [2023-09-01 08:52:37,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51048 conditions, 12835 events. 6723/12835 cut-off events. For 50317/50317 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 88806 event pairs, 1314 based on Foata normal form. 52/12806 useless extension candidates. Maximal degree in co-relation 35693. Up to 2316 conditions per place. [2023-09-01 08:52:37,719 INFO L137 encePairwiseOnDemand]: 268/290 looper letters, 393 selfloop transitions, 527 changer transitions 15/935 dead transitions. [2023-09-01 08:52:37,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 935 transitions, 10203 flow [2023-09-01 08:52:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-09-01 08:52:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-09-01 08:52:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6388 transitions. [2023-09-01 08:52:37,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31924037981009495 [2023-09-01 08:52:37,727 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6388 transitions. [2023-09-01 08:52:37,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6388 transitions. [2023-09-01 08:52:37,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:52:37,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6388 transitions. [2023-09-01 08:52:37,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 92.57971014492753) internal successors, (6388), 69 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:37,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:37,759 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:37,759 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2262 flow. Second operand 69 states and 6388 transitions. [2023-09-01 08:52:37,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 935 transitions, 10203 flow [2023-09-01 08:52:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 935 transitions, 9553 flow, removed 246 selfloop flow, removed 6 redundant places. [2023-09-01 08:52:37,938 INFO L231 Difference]: Finished difference. Result has 254 places, 604 transitions, 7936 flow [2023-09-01 08:52:37,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=7936, PETRI_PLACES=254, PETRI_TRANSITIONS=604} [2023-09-01 08:52:37,939 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 220 predicate places. [2023-09-01 08:52:37,939 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 604 transitions, 7936 flow [2023-09-01 08:52:37,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:37,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:52:37,940 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:52:37,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 08:52:38,146 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 [2023-09-01 08:52:38,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:52:38,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:52:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -277182823, now seen corresponding path program 1 times [2023-09-01 08:52:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:52:38,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034342975] [2023-09-01 08:52:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:52:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:52:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:52:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:52:38,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:52:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034342975] [2023-09-01 08:52:38,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034342975] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:52:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397279772] [2023-09-01 08:52:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:52:38,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:52:38,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:52:38,277 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) [2023-09-01 08:52:38,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:52:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:52:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:52:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:52:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 08:52:38,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:52:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 08:52:38,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397279772] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:52:38,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:52:38,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-09-01 08:52:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518886072] [2023-09-01 08:52:38,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:52:38,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 08:52:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:52:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 08:52:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:52:38,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-09-01 08:52:38,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 604 transitions, 7936 flow. Second operand has 13 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:38,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:52:38,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-09-01 08:52:38,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:52:42,476 INFO L130 PetriNetUnfolder]: 7562/14524 cut-off events. [2023-09-01 08:52:42,476 INFO L131 PetriNetUnfolder]: For 213048/213048 co-relation queries the response was YES. [2023-09-01 08:52:42,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98551 conditions, 14524 events. 7562/14524 cut-off events. For 213048/213048 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 104672 event pairs, 2021 based on Foata normal form. 67/14516 useless extension candidates. Maximal degree in co-relation 94717. Up to 6835 conditions per place. [2023-09-01 08:52:42,655 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 600 selfloop transitions, 266 changer transitions 12/878 dead transitions. [2023-09-01 08:52:42,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 878 transitions, 12987 flow [2023-09-01 08:52:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 08:52:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 08:52:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2197 transitions. [2023-09-01 08:52:42,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47349137931034485 [2023-09-01 08:52:42,659 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2197 transitions. [2023-09-01 08:52:42,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2197 transitions. [2023-09-01 08:52:42,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:52:42,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2197 transitions. [2023-09-01 08:52:42,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.3125) internal successors, (2197), 16 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:42,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:42,667 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:42,667 INFO L175 Difference]: Start difference. First operand has 254 places, 604 transitions, 7936 flow. Second operand 16 states and 2197 transitions. [2023-09-01 08:52:42,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 878 transitions, 12987 flow [2023-09-01 08:52:43,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 878 transitions, 12378 flow, removed 274 selfloop flow, removed 12 redundant places. [2023-09-01 08:52:43,235 INFO L231 Difference]: Finished difference. Result has 265 places, 673 transitions, 9437 flow [2023-09-01 08:52:43,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9437, PETRI_PLACES=265, PETRI_TRANSITIONS=673} [2023-09-01 08:52:43,235 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 231 predicate places. [2023-09-01 08:52:43,236 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 673 transitions, 9437 flow [2023-09-01 08:52:43,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:43,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:52:43,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:52:43,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:52:43,437 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 [2023-09-01 08:52:43,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:52:43,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:52:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -884143630, now seen corresponding path program 6 times [2023-09-01 08:52:43,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:52:43,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35658855] [2023-09-01 08:52:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:52:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:52:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:52:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:52:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:52:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35658855] [2023-09-01 08:52:44,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35658855] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:52:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169031658] [2023-09-01 08:52:44,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:52:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:52:44,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:52:44,493 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) [2023-09-01 08:52:44,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:52:44,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 08:52:44,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:52:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 08:52:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:52:44,591 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-09-01 08:52:44,591 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 [2023-09-01 08:52:44,841 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 22 treesize of output 17 [2023-09-01 08:52:44,946 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 59 treesize of output 54 [2023-09-01 08:52:45,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 45 [2023-09-01 08:52:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-09-01 08:52:48,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:52:48,969 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_439) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296) 4294967294))) is different from false [2023-09-01 08:52:48,976 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_439) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-09-01 08:52:48,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:52:48,985 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 [2023-09-01 08:52:48,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:52:48,996 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 [2023-09-01 08:52:49,000 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 [2023-09-01 08:52:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2023-09-01 08:52:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169031658] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:52:49,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:52:49,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 47 [2023-09-01 08:52:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486526078] [2023-09-01 08:52:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:52:49,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 08:52:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:52:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 08:52:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2010, Unknown=3, NotChecked=182, Total=2352 [2023-09-01 08:52:49,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-09-01 08:52:49,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 673 transitions, 9437 flow. Second operand has 49 states, 49 states have (on average 87.85714285714286) internal successors, (4305), 49 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:52:49,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:52:49,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-09-01 08:52:49,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:53:15,203 INFO L130 PetriNetUnfolder]: 9474/18208 cut-off events. [2023-09-01 08:53:15,203 INFO L131 PetriNetUnfolder]: For 281524/281524 co-relation queries the response was YES. [2023-09-01 08:53:15,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125226 conditions, 18208 events. 9474/18208 cut-off events. For 281524/281524 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 137193 event pairs, 1415 based on Foata normal form. 36/18138 useless extension candidates. Maximal degree in co-relation 121428. Up to 6028 conditions per place. [2023-09-01 08:53:15,371 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 372 selfloop transitions, 795 changer transitions 15/1182 dead transitions. [2023-09-01 08:53:15,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1182 transitions, 17806 flow [2023-09-01 08:53:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-09-01 08:53:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-09-01 08:53:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5100 transitions. [2023-09-01 08:53:15,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2023-09-01 08:53:15,377 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5100 transitions. [2023-09-01 08:53:15,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5100 transitions. [2023-09-01 08:53:15,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:53:15,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5100 transitions. [2023-09-01 08:53:15,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 92.72727272727273) internal successors, (5100), 55 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:15,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 290.0) internal successors, (16240), 56 states have internal predecessors, (16240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:15,391 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 290.0) internal successors, (16240), 56 states have internal predecessors, (16240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:15,391 INFO L175 Difference]: Start difference. First operand has 265 places, 673 transitions, 9437 flow. Second operand 55 states and 5100 transitions. [2023-09-01 08:53:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1182 transitions, 17806 flow [2023-09-01 08:53:15,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1182 transitions, 17607 flow, removed 92 selfloop flow, removed 3 redundant places. [2023-09-01 08:53:15,938 INFO L231 Difference]: Finished difference. Result has 323 places, 876 transitions, 14025 flow [2023-09-01 08:53:15,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=9270, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=14025, PETRI_PLACES=323, PETRI_TRANSITIONS=876} [2023-09-01 08:53:15,938 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 289 predicate places. [2023-09-01 08:53:15,939 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 876 transitions, 14025 flow [2023-09-01 08:53:15,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 87.85714285714286) internal successors, (4305), 49 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:15,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:53:15,952 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] [2023-09-01 08:53:15,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:53:16,153 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 [2023-09-01 08:53:16,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:53:16,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:53:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1318437623, now seen corresponding path program 1 times [2023-09-01 08:53:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:53:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694915347] [2023-09-01 08:53:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:53:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:53:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:53:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:53:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:53:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694915347] [2023-09-01 08:53:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694915347] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:53:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697058190] [2023-09-01 08:53:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:53:16,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:53:16,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:53:16,975 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) [2023-09-01 08:53:16,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:53:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:53:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 08:53:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:53:17,339 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 18 treesize of output 13 [2023-09-01 08:53:17,798 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 48 treesize of output 34 [2023-09-01 08:53:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:53:18,626 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 45 [2023-09-01 08:53:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:53:19,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:53:20,505 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 [2023-09-01 08:53:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:53:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697058190] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:53:20,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:53:20,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-09-01 08:53:20,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311588563] [2023-09-01 08:53:20,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:53:20,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-09-01 08:53:20,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:53:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-09-01 08:53:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3406, Unknown=0, NotChecked=0, Total=3782 [2023-09-01 08:53:28,904 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] [2023-09-01 08:53:33,394 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] [2023-09-01 08:53:34,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-09-01 08:53:34,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 876 transitions, 14025 flow. Second operand has 62 states, 62 states have (on average 107.74193548387096) internal successors, (6680), 62 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:34,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:53:34,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-09-01 08:53:34,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:53:54,687 INFO L130 PetriNetUnfolder]: 12398/24270 cut-off events. [2023-09-01 08:53:54,688 INFO L131 PetriNetUnfolder]: For 407246/407246 co-relation queries the response was YES. [2023-09-01 08:53:54,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172906 conditions, 24270 events. 12398/24270 cut-off events. For 407246/407246 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 189019 event pairs, 3250 based on Foata normal form. 306/24470 useless extension candidates. Maximal degree in co-relation 168972. Up to 11594 conditions per place. [2023-09-01 08:53:54,905 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 873 selfloop transitions, 626 changer transitions 93/1592 dead transitions. [2023-09-01 08:53:54,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1592 transitions, 26867 flow [2023-09-01 08:53:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-09-01 08:53:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-09-01 08:53:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7741 transitions. [2023-09-01 08:53:54,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38685657171414295 [2023-09-01 08:53:54,912 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7741 transitions. [2023-09-01 08:53:54,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7741 transitions. [2023-09-01 08:53:54,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:53:54,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7741 transitions. [2023-09-01 08:53:54,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 112.18840579710145) internal successors, (7741), 69 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:54,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:54,930 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:54,930 INFO L175 Difference]: Start difference. First operand has 323 places, 876 transitions, 14025 flow. Second operand 69 states and 7741 transitions. [2023-09-01 08:53:54,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1592 transitions, 26867 flow [2023-09-01 08:53:56,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1592 transitions, 25778 flow, removed 231 selfloop flow, removed 20 redundant places. [2023-09-01 08:53:56,221 INFO L231 Difference]: Finished difference. Result has 405 places, 1205 transitions, 20785 flow [2023-09-01 08:53:56,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13236, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=20785, PETRI_PLACES=405, PETRI_TRANSITIONS=1205} [2023-09-01 08:53:56,222 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 371 predicate places. [2023-09-01 08:53:56,223 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1205 transitions, 20785 flow [2023-09-01 08:53:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 107.74193548387096) internal successors, (6680), 62 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:53:56,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:53:56,224 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] [2023-09-01 08:53:56,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:53:56,425 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 [2023-09-01 08:53:56,425 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:53:56,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:53:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1071599769, now seen corresponding path program 2 times [2023-09-01 08:53:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:53:56,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208072393] [2023-09-01 08:53:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:53:56,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:53:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:53:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:53:57,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:53:57,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208072393] [2023-09-01 08:53:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208072393] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:53:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456562174] [2023-09-01 08:53:57,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:53:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:53:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:53:57,506 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) [2023-09-01 08:53:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:53:57,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:53:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:53:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 89 conjunts are in the unsatisfiable core [2023-09-01 08:53:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:53:57,655 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-09-01 08:53:57,656 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 [2023-09-01 08:53:57,925 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 18 treesize of output 13 [2023-09-01 08:53:58,069 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 43 treesize of output 38 [2023-09-01 08:53:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:53:58,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-09-01 08:53:59,162 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 78 treesize of output 45 [2023-09-01 08:54:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:54:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:54:04,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:54:04,465 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 [2023-09-01 08:54:04,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:54:04,475 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 [2023-09-01 08:54:04,479 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 [2023-09-01 08:54:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:54:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456562174] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:54:04,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:54:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 61 [2023-09-01 08:54:04,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889660477] [2023-09-01 08:54:04,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:54:04,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-09-01 08:54:04,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:54:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-09-01 08:54:04,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3665, Unknown=3, NotChecked=0, Total=3906 [2023-09-01 08:54:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 290 [2023-09-01 08:54:14,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1205 transitions, 20785 flow. Second operand has 63 states, 63 states have (on average 104.71428571428571) internal successors, (6597), 63 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:54:14,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:54:14,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 290 [2023-09-01 08:54:14,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:54:33,027 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] [2023-09-01 08:55:13,192 INFO L130 PetriNetUnfolder]: 22436/44369 cut-off events. [2023-09-01 08:55:13,193 INFO L131 PetriNetUnfolder]: For 949495/949495 co-relation queries the response was YES. [2023-09-01 08:55:13,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343464 conditions, 44369 events. 22436/44369 cut-off events. For 949495/949495 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 375431 event pairs, 3575 based on Foata normal form. 416/44574 useless extension candidates. Maximal degree in co-relation 338506. Up to 13908 conditions per place. [2023-09-01 08:55:13,861 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 671 selfloop transitions, 2220 changer transitions 75/2966 dead transitions. [2023-09-01 08:55:13,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2966 transitions, 54575 flow [2023-09-01 08:55:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-09-01 08:55:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-09-01 08:55:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 11463 transitions. [2023-09-01 08:55:13,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37645320197044335 [2023-09-01 08:55:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 11463 transitions. [2023-09-01 08:55:13,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 11463 transitions. [2023-09-01 08:55:13,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:55:13,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 11463 transitions. [2023-09-01 08:55:13,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 109.17142857142858) internal successors, (11463), 105 states have internal predecessors, (11463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:13,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 290.0) internal successors, (30740), 106 states have internal predecessors, (30740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:13,902 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 290.0) internal successors, (30740), 106 states have internal predecessors, (30740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:13,902 INFO L175 Difference]: Start difference. First operand has 405 places, 1205 transitions, 20785 flow. Second operand 105 states and 11463 transitions. [2023-09-01 08:55:13,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2966 transitions, 54575 flow [2023-09-01 08:55:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 2966 transitions, 52444 flow, removed 1040 selfloop flow, removed 13 redundant places. [2023-09-01 08:55:17,345 INFO L231 Difference]: Finished difference. Result has 513 places, 2357 transitions, 45579 flow [2023-09-01 08:55:17,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=19842, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=45579, PETRI_PLACES=513, PETRI_TRANSITIONS=2357} [2023-09-01 08:55:17,346 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 479 predicate places. [2023-09-01 08:55:17,346 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2357 transitions, 45579 flow [2023-09-01 08:55:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 104.71428571428571) internal successors, (6597), 63 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:17,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:55:17,347 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] [2023-09-01 08:55:17,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:55:17,552 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 [2023-09-01 08:55:17,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:55:17,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:55:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2086904968, now seen corresponding path program 2 times [2023-09-01 08:55:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:55:17,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749402228] [2023-09-01 08:55:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:55:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:55:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:55:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:55:17,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:55:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749402228] [2023-09-01 08:55:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749402228] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:55:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645198362] [2023-09-01 08:55:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:55:17,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:55:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:55:17,760 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) [2023-09-01 08:55:17,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:55:17,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:55:17,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:55:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:55:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:55:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:55:17,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:55:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:55:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645198362] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:55:18,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:55:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-09-01 08:55:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315156027] [2023-09-01 08:55:18,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:55:18,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 08:55:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:55:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 08:55:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-09-01 08:55:18,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2023-09-01 08:55:18,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2357 transitions, 45579 flow. Second operand has 19 states, 19 states have (on average 130.31578947368422) internal successors, (2476), 19 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:18,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:55:18,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2023-09-01 08:55:18,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:55:46,629 INFO L130 PetriNetUnfolder]: 24275/48305 cut-off events. [2023-09-01 08:55:46,630 INFO L131 PetriNetUnfolder]: For 1150397/1150397 co-relation queries the response was YES. [2023-09-01 08:55:47,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389768 conditions, 48305 events. 24275/48305 cut-off events. For 1150397/1150397 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 415559 event pairs, 6885 based on Foata normal form. 191/48362 useless extension candidates. Maximal degree in co-relation 385923. Up to 14736 conditions per place. [2023-09-01 08:55:47,812 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 1203 selfloop transitions, 1865 changer transitions 12/3080 dead transitions. [2023-09-01 08:55:47,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 3080 transitions, 65281 flow [2023-09-01 08:55:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:55:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:55:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3236 transitions. [2023-09-01 08:55:47,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649425287356322 [2023-09-01 08:55:47,815 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3236 transitions. [2023-09-01 08:55:47,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3236 transitions. [2023-09-01 08:55:47,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:55:47,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3236 transitions. [2023-09-01 08:55:47,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 134.83333333333334) internal successors, (3236), 24 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:47,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:47,822 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:47,822 INFO L175 Difference]: Start difference. First operand has 513 places, 2357 transitions, 45579 flow. Second operand 24 states and 3236 transitions. [2023-09-01 08:55:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 3080 transitions, 65281 flow [2023-09-01 08:55:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 3080 transitions, 60543 flow, removed 1965 selfloop flow, removed 28 redundant places. [2023-09-01 08:55:54,551 INFO L231 Difference]: Finished difference. Result has 513 places, 2573 transitions, 52195 flow [2023-09-01 08:55:54,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=41867, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=52195, PETRI_PLACES=513, PETRI_TRANSITIONS=2573} [2023-09-01 08:55:54,552 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 479 predicate places. [2023-09-01 08:55:54,552 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2573 transitions, 52195 flow [2023-09-01 08:55:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 130.31578947368422) internal successors, (2476), 19 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:54,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:55:54,553 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-09-01 08:55:54,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:55:54,759 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 [2023-09-01 08:55:54,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:55:54,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:55:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 674057269, now seen corresponding path program 3 times [2023-09-01 08:55:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:55:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631784154] [2023-09-01 08:55:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:55:54,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:55:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:55:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:55:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:55:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631784154] [2023-09-01 08:55:54,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631784154] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:55:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411722610] [2023-09-01 08:55:54,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:55:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:55:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:55:54,866 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) [2023-09-01 08:55:54,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:55:55,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 08:55:55,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:55:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:55:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:55:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:55:55,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:55:55,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411722610] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:55:55,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:55:55,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-09-01 08:55:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979910445] [2023-09-01 08:55:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:55:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:55:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:55:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:55:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-09-01 08:55:55,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 290 [2023-09-01 08:55:55,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2573 transitions, 52195 flow. Second operand has 8 states, 8 states have (on average 143.5) internal successors, (1148), 8 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:55:55,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:55:55,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 290 [2023-09-01 08:55:55,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:56:22,688 INFO L130 PetriNetUnfolder]: 21555/43151 cut-off events. [2023-09-01 08:56:22,688 INFO L131 PetriNetUnfolder]: For 852901/852917 co-relation queries the response was YES. [2023-09-01 08:56:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324607 conditions, 43151 events. 21555/43151 cut-off events. For 852901/852917 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 374961 event pairs, 5974 based on Foata normal form. 1138/44264 useless extension candidates. Maximal degree in co-relation 321744. Up to 22481 conditions per place. [2023-09-01 08:56:23,799 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 1175 selfloop transitions, 9 changer transitions 1585/2959 dead transitions. [2023-09-01 08:56:23,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 2959 transitions, 63415 flow [2023-09-01 08:56:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:56:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:56:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1245 transitions. [2023-09-01 08:56:23,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366379310344828 [2023-09-01 08:56:23,802 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1245 transitions. [2023-09-01 08:56:23,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1245 transitions. [2023-09-01 08:56:23,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:56:23,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1245 transitions. [2023-09-01 08:56:23,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.625) internal successors, (1245), 8 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:56:23,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:56:23,806 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:56:23,806 INFO L175 Difference]: Start difference. First operand has 513 places, 2573 transitions, 52195 flow. Second operand 8 states and 1245 transitions. [2023-09-01 08:56:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 2959 transitions, 63415 flow [2023-09-01 08:56:30,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2959 transitions, 60073 flow, removed 941 selfloop flow, removed 12 redundant places. [2023-09-01 08:56:30,461 INFO L231 Difference]: Finished difference. Result has 509 places, 1091 transitions, 19012 flow [2023-09-01 08:56:30,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=34869, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19012, PETRI_PLACES=509, PETRI_TRANSITIONS=1091} [2023-09-01 08:56:30,462 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 475 predicate places. [2023-09-01 08:56:30,462 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1091 transitions, 19012 flow [2023-09-01 08:56:30,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.5) internal successors, (1148), 8 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:56:30,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:56:30,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:56:30,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:56:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 08:56:30,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:56:30,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:56:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash -171052028, now seen corresponding path program 3 times [2023-09-01 08:56:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:56:30,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203491969] [2023-09-01 08:56:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:56:30,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:56:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:56:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:56:31,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:56:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203491969] [2023-09-01 08:56:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203491969] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:56:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341186307] [2023-09-01 08:56:31,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:56:31,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:56:31,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:56:31,817 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:56:31,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:56:32,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 08:56:32,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:56:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 84 conjunts are in the unsatisfiable core [2023-09-01 08:56:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:56:32,080 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 08:56:32,080 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 [2023-09-01 08:56:32,488 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 18 treesize of output 13 [2023-09-01 08:56:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:56:32,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-09-01 08:56:33,046 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 43 treesize of output 38 [2023-09-01 08:56:33,783 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 78 treesize of output 45 [2023-09-01 08:56:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:56:34,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:56:38,475 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-09-01 08:56:38,476 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 [2023-09-01 08:56:38,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:56:38,492 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 [2023-09-01 08:56:38,498 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 [2023-09-01 08:56:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:56:42,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341186307] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:56:42,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:56:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 22] total 71 [2023-09-01 08:56:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444527857] [2023-09-01 08:56:42,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:56:42,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-09-01 08:56:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:56:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-09-01 08:56:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4900, Unknown=39, NotChecked=0, Total=5256 [2023-09-01 08:56:45,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:56:47,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:56:51,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:56:53,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:56:59,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:57:03,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:57:04,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-09-01 08:57:04,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1091 transitions, 19012 flow. Second operand has 73 states, 73 states have (on average 87.76712328767124) internal successors, (6407), 73 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:57:04,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:57:04,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-09-01 08:57:04,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:57:08,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:13,999 WARN L539 Checker$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] [2023-09-01 08:57:15,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:18,155 WARN L539 Checker$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] [2023-09-01 08:57:21,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:24,082 WARN L539 Checker$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] [2023-09-01 08:57:26,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:27,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:29,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:32,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:34,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:36,713 WARN L539 Checker$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] [2023-09-01 08:57:39,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:41,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:57:45,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:47,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:49,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:52,544 WARN L539 Checker$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] [2023-09-01 08:57:54,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:57:57,114 WARN L539 Checker$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] [2023-09-01 08:58:00,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:03,035 WARN L539 Checker$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] [2023-09-01 08:58:05,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:08,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:11,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:14,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:17,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:19,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:20,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:23,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:26,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:28,757 WARN L539 Checker$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] [2023-09-01 08:58:32,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:34,837 WARN L539 Checker$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] [2023-09-01 08:58:37,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:42,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:58:44,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:46,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:48,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:50,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:56,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:58:58,083 WARN L539 Checker$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] [2023-09-01 08:59:00,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:02,251 WARN L539 Checker$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] [2023-09-01 08:59:04,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:08,584 WARN L539 Checker$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] [2023-09-01 08:59:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:14,077 WARN L539 Checker$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] [2023-09-01 08:59:16,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:18,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:20,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:22,762 WARN L539 Checker$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] [2023-09-01 08:59:24,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:27,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:28,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:30,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:32,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:34,787 WARN L539 Checker$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] [2023-09-01 08:59:36,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:38,925 WARN L539 Checker$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] [2023-09-01 08:59:41,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:43,721 WARN L539 Checker$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] [2023-09-01 08:59:45,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:47,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:50,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:52,275 WARN L539 Checker$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] [2023-09-01 08:59:55,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:59:57,398 WARN L539 Checker$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] [2023-09-01 08:59:59,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:02,062 WARN L539 Checker$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] [2023-09-01 09:00:03,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:06,072 WARN L539 Checker$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] [2023-09-01 09:00:08,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:10,625 WARN L539 Checker$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] [2023-09-01 09:00:12,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:15,328 WARN L539 Checker$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] [2023-09-01 09:00:17,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:19,493 WARN L539 Checker$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] [2023-09-01 09:00:21,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:28,522 WARN L539 Checker$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] [2023-09-01 09:00:31,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:33,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:36,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:39,233 WARN L539 Checker$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] [2023-09-01 09:00:42,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:45,949 WARN L539 Checker$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] [2023-09-01 09:00:48,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:50,073 WARN L539 Checker$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] [2023-09-01 09:00:52,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:00:54,671 WARN L539 Checker$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] [2023-09-01 09:00:57,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:00,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:03,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:05,645 WARN L539 Checker$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] [2023-09-01 09:01:08,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:12,712 WARN L539 Checker$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] [2023-09-01 09:01:16,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:18,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:22,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:24,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:26,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:33,965 WARN L539 Checker$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] [2023-09-01 09:01:35,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:39,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:42,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:01:44,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:51,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:53,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:56,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:01:58,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:02,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:05,914 WARN L539 Checker$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] [2023-09-01 09:02:08,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:10,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:12,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:16,841 WARN L539 Checker$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] [2023-09-01 09:02:19,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:21,645 WARN L539 Checker$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] [2023-09-01 09:02:23,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:26,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:29,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:31,613 WARN L539 Checker$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] [2023-09-01 09:02:34,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:36,615 WARN L539 Checker$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] [2023-09-01 09:02:39,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:41,448 WARN L539 Checker$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] [2023-09-01 09:02:43,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:48,714 WARN L539 Checker$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] [2023-09-01 09:02:51,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:02:55,775 WARN L539 Checker$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] [2023-09-01 09:02:57,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:03:04,458 WARN L539 Checker$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] [2023-09-01 09:03:16,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:03:20,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:03:22,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 09:03:24,126 WARN L539 Checker$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] [2023-09-01 09:03:39,636 INFO L130 PetriNetUnfolder]: 11599/23750 cut-off events. [2023-09-01 09:03:39,636 INFO L131 PetriNetUnfolder]: For 410845/410845 co-relation queries the response was YES. [2023-09-01 09:03:40,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180982 conditions, 23750 events. 11599/23750 cut-off events. For 410845/410845 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 192579 event pairs, 1266 based on Foata normal form. 16/23766 useless extension candidates. Maximal degree in co-relation 173852. Up to 7436 conditions per place. [2023-09-01 09:03:40,058 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 544 selfloop transitions, 1185 changer transitions 124/1853 dead transitions. [2023-09-01 09:03:40,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1853 transitions, 32103 flow [2023-09-01 09:03:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-09-01 09:03:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2023-09-01 09:03:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 10957 transitions. [2023-09-01 09:03:40,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31485632183908047 [2023-09-01 09:03:40,090 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 10957 transitions. [2023-09-01 09:03:40,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 10957 transitions. [2023-09-01 09:03:40,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:40,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 10957 transitions. [2023-09-01 09:03:40,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 91.30833333333334) internal successors, (10957), 120 states have internal predecessors, (10957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:40,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 290.0) internal successors, (35090), 121 states have internal predecessors, (35090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:40,132 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 290.0) internal successors, (35090), 121 states have internal predecessors, (35090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:40,133 INFO L175 Difference]: Start difference. First operand has 509 places, 1091 transitions, 19012 flow. Second operand 120 states and 10957 transitions. [2023-09-01 09:03:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1853 transitions, 32103 flow [2023-09-01 09:03:41,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1853 transitions, 29727 flow, removed 900 selfloop flow, removed 27 redundant places. [2023-09-01 09:03:41,990 INFO L231 Difference]: Finished difference. Result has 610 places, 1291 transitions, 23059 flow [2023-09-01 09:03:41,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=17458, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=23059, PETRI_PLACES=610, PETRI_TRANSITIONS=1291} [2023-09-01 09:03:41,992 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 576 predicate places. [2023-09-01 09:03:41,992 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1291 transitions, 23059 flow [2023-09-01 09:03:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 87.76712328767124) internal successors, (6407), 73 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:41,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:41,993 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:42,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 09:03:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 09:03:42,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:03:42,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash 62784281, now seen corresponding path program 3 times [2023-09-01 09:03:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:42,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037649892] [2023-09-01 09:03:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:42,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:42,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037649892] [2023-09-01 09:03:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037649892] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:42,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419832410] [2023-09-01 09:03:42,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:03:42,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:42,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 09:03:42,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 09:03:42,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 09:03:42,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 09:03:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 09:03:42,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 09:03:42,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419832410] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:42,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 17 [2023-09-01 09:03:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194090775] [2023-09-01 09:03:42,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 09:03:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 09:03:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-09-01 09:03:43,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-09-01 09:03:43,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1291 transitions, 23059 flow. Second operand has 18 states, 18 states have (on average 131.33333333333334) internal successors, (2364), 18 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:43,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:43,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-09-01 09:03:43,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:52,497 INFO L130 PetriNetUnfolder]: 11728/24054 cut-off events. [2023-09-01 09:03:52,497 INFO L131 PetriNetUnfolder]: For 394291/394291 co-relation queries the response was YES. [2023-09-01 09:03:52,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182598 conditions, 24054 events. 11728/24054 cut-off events. For 394291/394291 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 195755 event pairs, 3396 based on Foata normal form. 14/24068 useless extension candidates. Maximal degree in co-relation 180056. Up to 10075 conditions per place. [2023-09-01 09:03:53,028 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 884 selfloop transitions, 531 changer transitions 64/1479 dead transitions. [2023-09-01 09:03:53,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1479 transitions, 28097 flow [2023-09-01 09:03:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 09:03:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 09:03:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2602 transitions. [2023-09-01 09:03:53,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722323049001815 [2023-09-01 09:03:53,030 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2602 transitions. [2023-09-01 09:03:53,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2602 transitions. [2023-09-01 09:03:53,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:53,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2602 transitions. [2023-09-01 09:03:53,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 136.94736842105263) internal successors, (2602), 19 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:53,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:53,038 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:53,038 INFO L175 Difference]: Start difference. First operand has 610 places, 1291 transitions, 23059 flow. Second operand 19 states and 2602 transitions. [2023-09-01 09:03:53,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1479 transitions, 28097 flow [2023-09-01 09:03:54,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1479 transitions, 25410 flow, removed 121 selfloop flow, removed 65 redundant places. [2023-09-01 09:03:54,431 INFO L231 Difference]: Finished difference. Result has 563 places, 1283 transitions, 21526 flow [2023-09-01 09:03:54,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=20345, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=21526, PETRI_PLACES=563, PETRI_TRANSITIONS=1283} [2023-09-01 09:03:54,432 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 529 predicate places. [2023-09-01 09:03:54,432 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1283 transitions, 21526 flow [2023-09-01 09:03:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.33333333333334) internal successors, (2364), 18 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:54,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:54,432 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] [2023-09-01 09:03:54,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 09:03:54,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:54,638 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:03:54,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1088570660, now seen corresponding path program 4 times [2023-09-01 09:03:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:54,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513110904] [2023-09-01 09:03:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:55,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513110904] [2023-09-01 09:03:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513110904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490663666] [2023-09-01 09:03:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:03:55,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:55,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 09:03:55,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 09:03:56,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:03:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:56,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 09:03:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:56,346 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 22 treesize of output 17 [2023-09-01 09:03:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:03:56,785 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 72 treesize of output 43 [2023-09-01 09:03:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:03:57,343 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 72 treesize of output 43 [2023-09-01 09:03:58,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 45 [2023-09-01 09:04:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:04:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:04:11,567 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 [2023-09-01 09:04:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:04:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490663666] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:04:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:04:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 25] total 77 [2023-09-01 09:04:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493101461] [2023-09-01 09:04:11,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:04:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-09-01 09:04:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:04:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-09-01 09:04:11,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5736, Unknown=2, NotChecked=0, Total=6006 [2023-09-01 09:04:17,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:23,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:38,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:42,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:44,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:48,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 290 [2023-09-01 09:04:48,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1283 transitions, 21526 flow. Second operand has 78 states, 78 states have (on average 104.96153846153847) internal successors, (8187), 78 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:04:48,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:04:48,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 290 [2023-09-01 09:04:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15