./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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 ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:03:21,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:03:21,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:03:21,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:03:21,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:03:21,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:03:21,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:03:21,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:03:21,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:03:21,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:03:21,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:03:21,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:03:21,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:03:21,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:03:21,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:03:21,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:03:21,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:03:21,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:03:21,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:03:21,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:03:21,152 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:03:21,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:03:21,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:03:21,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:03:21,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:03:21,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:03:21,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:03:21,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:03:21,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:03:21,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:03:21,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:03:21,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:03:21,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:03:21,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:03:21,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:03:21,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:03:21,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:03:21,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:03:21,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:03:21,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:03:21,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:03:21,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:03:21,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:03:21,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:03:21,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:03:21,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:03:21,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:03:21,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:03:21,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:03:21,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:03:21,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:03:21,182 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:03:21,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:03:21,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:03:21,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:03:21,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:03:21,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:03:21,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:03:21,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:03:21,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:03:21,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:03:21,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:03:21,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:03:21,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:03:21,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:03:21,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:03:21,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-07-21 09:03:21,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:03:21,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:03:21,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:03:21,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:03:21,475 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:03:21,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-21 09:03:21,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa61d12d/4c438fef5e774c5a91db9eda59a68d73/FLAG1ef0e194e [2022-07-21 09:03:21,891 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:03:21,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-21 09:03:21,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa61d12d/4c438fef5e774c5a91db9eda59a68d73/FLAG1ef0e194e [2022-07-21 09:03:21,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa61d12d/4c438fef5e774c5a91db9eda59a68d73 [2022-07-21 09:03:21,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:03:21,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:03:21,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:03:21,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:03:21,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:03:21,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:03:21" (1/1) ... [2022-07-21 09:03:21,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7538e85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:21, skipping insertion in model container [2022-07-21 09:03:21,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:03:21" (1/1) ... [2022-07-21 09:03:21,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:03:21,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:03:22,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-21 09:03:22,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:03:22,152 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:03:22,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-21 09:03:22,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:03:22,199 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:03:22,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22 WrapperNode [2022-07-21 09:03:22,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:03:22,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:03:22,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:03:22,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:03:22,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,262 INFO L137 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2022-07-21 09:03:22,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:03:22,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:03:22,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:03:22,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:03:22,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:03:22,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:03:22,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:03:22,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:03:22,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (1/1) ... [2022-07-21 09:03:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:03:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:22,344 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) [2022-07-21 09:03:22,361 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 [2022-07-21 09:03:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:03:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:03:22,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:03:22,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:03:22,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:03:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-21 09:03:22,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:03:22,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:03:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:03:22,385 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:03:22,509 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:03:22,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:03:22,919 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:03:23,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:03:23,021 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 09:03:23,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:03:23 BoogieIcfgContainer [2022-07-21 09:03:23,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:03:23,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:03:23,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:03:23,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:03:23,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:03:21" (1/3) ... [2022-07-21 09:03:23,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb3a4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:03:23, skipping insertion in model container [2022-07-21 09:03:23,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:22" (2/3) ... [2022-07-21 09:03:23,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb3a4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:03:23, skipping insertion in model container [2022-07-21 09:03:23,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:03:23" (3/3) ... [2022-07-21 09:03:23,028 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-07-21 09:03:23,032 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:03:23,038 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:03:23,038 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:03:23,038 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:03:23,106 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 09:03:23,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 247 transitions, 526 flow [2022-07-21 09:03:23,238 INFO L129 PetriNetUnfolder]: 19/243 cut-off events. [2022-07-21 09:03:23,239 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:03:23,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-07-21 09:03:23,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 247 transitions, 526 flow [2022-07-21 09:03:23,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 230 transitions, 484 flow [2022-07-21 09:03:23,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:03:23,270 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@503e438e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f65e615 [2022-07-21 09:03:23,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 09:03:23,319 INFO L129 PetriNetUnfolder]: 19/229 cut-off events. [2022-07-21 09:03:23,319 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:03:23,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:23,320 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:23,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash -22342228, now seen corresponding path program 1 times [2022-07-21 09:03:23,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:23,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097285717] [2022-07-21 09:03:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097285717] [2022-07-21 09:03:23,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097285717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:23,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:23,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:03:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165943416] [2022-07-21 09:03:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:23,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:03:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:23,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:03:23,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:03:23,598 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 247 [2022-07-21 09:03:23,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 230 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:23,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:23,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 247 [2022-07-21 09:03:23,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:23,781 INFO L129 PetriNetUnfolder]: 226/768 cut-off events. [2022-07-21 09:03:23,782 INFO L130 PetriNetUnfolder]: For 146/147 co-relation queries the response was YES. [2022-07-21 09:03:23,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 768 events. 226/768 cut-off events. For 146/147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3364 event pairs, 121 based on Foata normal form. 198/879 useless extension candidates. Maximal degree in co-relation 906. Up to 306 conditions per place. [2022-07-21 09:03:23,791 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 14 selfloop transitions, 0 changer transitions 7/217 dead transitions. [2022-07-21 09:03:23,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 217 transitions, 486 flow [2022-07-21 09:03:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:03:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:03:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 465 transitions. [2022-07-21 09:03:23,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9412955465587044 [2022-07-21 09:03:23,808 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 465 transitions. [2022-07-21 09:03:23,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 465 transitions. [2022-07-21 09:03:23,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:23,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 465 transitions. [2022-07-21 09:03:23,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:23,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:23,822 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:23,823 INFO L186 Difference]: Start difference. First operand has 224 places, 230 transitions, 484 flow. Second operand 2 states and 465 transitions. [2022-07-21 09:03:23,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 217 transitions, 486 flow [2022-07-21 09:03:23,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 217 transitions, 470 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-21 09:03:23,832 INFO L242 Difference]: Finished difference. Result has 217 places, 210 transitions, 428 flow [2022-07-21 09:03:23,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-07-21 09:03:23,837 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-21 09:03:23,837 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 428 flow [2022-07-21 09:03:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:23,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:23,838 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:03:23,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1261302060, now seen corresponding path program 1 times [2022-07-21 09:03:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618738748] [2022-07-21 09:03:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618738748] [2022-07-21 09:03:24,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618738748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:24,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:24,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:03:24,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956782702] [2022-07-21 09:03:24,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:03:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:03:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:03:24,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-07-21 09:03:24,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:24,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-07-21 09:03:24,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:24,643 INFO L129 PetriNetUnfolder]: 768/1413 cut-off events. [2022-07-21 09:03:24,644 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 09:03:24,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1413 events. 768/1413 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6588 event pairs, 30 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2632. Up to 669 conditions per place. [2022-07-21 09:03:24,653 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 66 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-07-21 09:03:24,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 620 flow [2022-07-21 09:03:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:03:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:03:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2022-07-21 09:03:24,656 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507229612492771 [2022-07-21 09:03:24,656 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2022-07-21 09:03:24,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2022-07-21 09:03:24,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:24,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2022-07-21 09:03:24,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,670 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,670 INFO L186 Difference]: Start difference. First operand has 217 places, 210 transitions, 428 flow. Second operand 7 states and 1298 transitions. [2022-07-21 09:03:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 620 flow [2022-07-21 09:03:24,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 231 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:24,674 INFO L242 Difference]: Finished difference. Result has 217 places, 211 transitions, 448 flow [2022-07-21 09:03:24,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-07-21 09:03:24,675 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-21 09:03:24,675 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 448 flow [2022-07-21 09:03:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:24,676 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:03:24,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1722981983, now seen corresponding path program 1 times [2022-07-21 09:03:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:24,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775661638] [2022-07-21 09:03:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775661638] [2022-07-21 09:03:24,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775661638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901344766] [2022-07-21 09:03:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:24,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-21 09:03:24,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:24,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:24,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-21 09:03:24,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:25,148 INFO L129 PetriNetUnfolder]: 1288/2417 cut-off events. [2022-07-21 09:03:25,148 INFO L130 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-07-21 09:03:25,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 2417 events. 1288/2417 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14061 event pairs, 158 based on Foata normal form. 18/2250 useless extension candidates. Maximal degree in co-relation 4666. Up to 1064 conditions per place. [2022-07-21 09:03:25,184 INFO L132 encePairwiseOnDemand]: 242/247 looper letters, 58 selfloop transitions, 4 changer transitions 0/246 dead transitions. [2022-07-21 09:03:25,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 246 transitions, 675 flow [2022-07-21 09:03:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:03:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:03:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1095 transitions. [2022-07-21 09:03:25,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8866396761133604 [2022-07-21 09:03:25,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1095 transitions. [2022-07-21 09:03:25,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1095 transitions. [2022-07-21 09:03:25,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:25,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1095 transitions. [2022-07-21 09:03:25,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:25,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:25,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:25,191 INFO L186 Difference]: Start difference. First operand has 217 places, 211 transitions, 448 flow. Second operand 5 states and 1095 transitions. [2022-07-21 09:03:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 246 transitions, 675 flow [2022-07-21 09:03:25,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 246 transitions, 661 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:03:25,196 INFO L242 Difference]: Finished difference. Result has 218 places, 213 transitions, 463 flow [2022-07-21 09:03:25,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-07-21 09:03:25,197 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-07-21 09:03:25,197 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 463 flow [2022-07-21 09:03:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:25,198 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:25,198 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:03:25,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 273955145, now seen corresponding path program 2 times [2022-07-21 09:03:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732152066] [2022-07-21 09:03:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732152066] [2022-07-21 09:03:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732152066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34380380] [2022-07-21 09:03:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:03:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:25,372 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) [2022-07-21 09:03:25,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:03:25,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:03:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:25,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34380380] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:25,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:03:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:03:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379100426] [2022-07-21 09:03:25,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:03:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:03:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:03:25,907 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 247 [2022-07-21 09:03:25,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:25,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:25,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 247 [2022-07-21 09:03:25,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:26,339 INFO L129 PetriNetUnfolder]: 1220/2724 cut-off events. [2022-07-21 09:03:26,339 INFO L130 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2022-07-21 09:03:26,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 2724 events. 1220/2724 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17722 event pairs, 215 based on Foata normal form. 35/2572 useless extension candidates. Maximal degree in co-relation 5051. Up to 455 conditions per place. [2022-07-21 09:03:26,359 INFO L132 encePairwiseOnDemand]: 238/247 looper letters, 82 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2022-07-21 09:03:26,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 254 transitions, 759 flow [2022-07-21 09:03:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:03:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:03:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1497 transitions. [2022-07-21 09:03:26,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575910931174089 [2022-07-21 09:03:26,362 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1497 transitions. [2022-07-21 09:03:26,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1497 transitions. [2022-07-21 09:03:26,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:26,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1497 transitions. [2022-07-21 09:03:26,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:26,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:26,369 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:26,369 INFO L186 Difference]: Start difference. First operand has 218 places, 213 transitions, 463 flow. Second operand 8 states and 1497 transitions. [2022-07-21 09:03:26,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 254 transitions, 759 flow [2022-07-21 09:03:26,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 254 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:03:26,375 INFO L242 Difference]: Finished difference. Result has 227 places, 220 transitions, 523 flow [2022-07-21 09:03:26,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=523, PETRI_PLACES=227, PETRI_TRANSITIONS=220} [2022-07-21 09:03:26,376 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 3 predicate places. [2022-07-21 09:03:26,376 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 220 transitions, 523 flow [2022-07-21 09:03:26,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:26,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:26,376 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:26,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:26,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:26,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1178444087, now seen corresponding path program 3 times [2022-07-21 09:03:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:26,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799317631] [2022-07-21 09:03:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799317631] [2022-07-21 09:03:26,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799317631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:26,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:26,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509562486] [2022-07-21 09:03:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:26,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:26,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-21 09:03:26,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 220 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:26,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:26,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-21 09:03:26,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:27,932 INFO L129 PetriNetUnfolder]: 4916/9783 cut-off events. [2022-07-21 09:03:27,932 INFO L130 PetriNetUnfolder]: For 4883/4900 co-relation queries the response was YES. [2022-07-21 09:03:27,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21837 conditions, 9783 events. 4916/9783 cut-off events. For 4883/4900 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83346 event pairs, 906 based on Foata normal form. 80/9460 useless extension candidates. Maximal degree in co-relation 21826. Up to 2240 conditions per place. [2022-07-21 09:03:28,017 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 97 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2022-07-21 09:03:28,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 307 transitions, 1136 flow [2022-07-21 09:03:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:03:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:03:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1537 transitions. [2022-07-21 09:03:28,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8889531521110469 [2022-07-21 09:03:28,020 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1537 transitions. [2022-07-21 09:03:28,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1537 transitions. [2022-07-21 09:03:28,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:28,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1537 transitions. [2022-07-21 09:03:28,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.57142857142858) internal successors, (1537), 7 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:28,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:28,026 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:28,026 INFO L186 Difference]: Start difference. First operand has 227 places, 220 transitions, 523 flow. Second operand 7 states and 1537 transitions. [2022-07-21 09:03:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 307 transitions, 1136 flow [2022-07-21 09:03:28,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 1131 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:03:28,038 INFO L242 Difference]: Finished difference. Result has 235 places, 243 transitions, 746 flow [2022-07-21 09:03:28,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=235, PETRI_TRANSITIONS=243} [2022-07-21 09:03:28,040 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 11 predicate places. [2022-07-21 09:03:28,040 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 243 transitions, 746 flow [2022-07-21 09:03:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:28,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:28,042 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:03:28,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1298721201, now seen corresponding path program 4 times [2022-07-21 09:03:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:28,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511622054] [2022-07-21 09:03:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:28,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511622054] [2022-07-21 09:03:28,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511622054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:28,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070103756] [2022-07-21 09:03:28,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:03:28,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:28,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:28,172 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) [2022-07-21 09:03:28,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:03:28,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:03:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:03:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:28,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:03:28,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070103756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:28,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:03:28,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-21 09:03:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620728330] [2022-07-21 09:03:28,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:28,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:03:28,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:03:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:03:28,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-21 09:03:28,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 243 transitions, 746 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:28,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:28,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-21 09:03:28,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:29,136 INFO L129 PetriNetUnfolder]: 2037/5163 cut-off events. [2022-07-21 09:03:29,136 INFO L130 PetriNetUnfolder]: For 6534/7827 co-relation queries the response was YES. [2022-07-21 09:03:29,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13229 conditions, 5163 events. 2037/5163 cut-off events. For 6534/7827 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 42769 event pairs, 859 based on Foata normal form. 205/4999 useless extension candidates. Maximal degree in co-relation 13213. Up to 2472 conditions per place. [2022-07-21 09:03:29,181 INFO L132 encePairwiseOnDemand]: 236/247 looper letters, 44 selfloop transitions, 8 changer transitions 20/267 dead transitions. [2022-07-21 09:03:29,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 267 transitions, 942 flow [2022-07-21 09:03:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:03:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:03:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1803 transitions. [2022-07-21 09:03:29,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8110661268556005 [2022-07-21 09:03:29,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1803 transitions. [2022-07-21 09:03:29,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1803 transitions. [2022-07-21 09:03:29,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:29,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1803 transitions. [2022-07-21 09:03:29,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:29,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:29,191 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:29,192 INFO L186 Difference]: Start difference. First operand has 235 places, 243 transitions, 746 flow. Second operand 9 states and 1803 transitions. [2022-07-21 09:03:29,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 267 transitions, 942 flow [2022-07-21 09:03:29,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 267 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:29,208 INFO L242 Difference]: Finished difference. Result has 245 places, 244 transitions, 778 flow [2022-07-21 09:03:29,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=245, PETRI_TRANSITIONS=244} [2022-07-21 09:03:29,209 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 21 predicate places. [2022-07-21 09:03:29,209 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 244 transitions, 778 flow [2022-07-21 09:03:29,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:29,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:29,210 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:29,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:29,428 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,SelfDestructingSolverStorable5 [2022-07-21 09:03:29,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash -629110740, now seen corresponding path program 1 times [2022-07-21 09:03:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472191484] [2022-07-21 09:03:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:29,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472191484] [2022-07-21 09:03:29,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472191484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:29,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257952953] [2022-07-21 09:03:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:29,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:29,560 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) [2022-07-21 09:03:29,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:03:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:03:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:30,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:30,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257952953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:30,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:30,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 10] total 19 [2022-07-21 09:03:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462510501] [2022-07-21 09:03:30,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:03:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:03:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:03:30,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 247 [2022-07-21 09:03:30,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 244 transitions, 778 flow. Second operand has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:30,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:30,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 247 [2022-07-21 09:03:30,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:33,737 INFO L129 PetriNetUnfolder]: 11735/23121 cut-off events. [2022-07-21 09:03:33,737 INFO L130 PetriNetUnfolder]: For 26101/26176 co-relation queries the response was YES. [2022-07-21 09:03:33,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 23121 events. 11735/23121 cut-off events. For 26101/26176 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 224593 event pairs, 440 based on Foata normal form. 144/22012 useless extension candidates. Maximal degree in co-relation 58725. Up to 3349 conditions per place. [2022-07-21 09:03:33,967 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 292 selfloop transitions, 162 changer transitions 2/613 dead transitions. [2022-07-21 09:03:33,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 613 transitions, 3657 flow [2022-07-21 09:03:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:03:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-21 09:03:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4265 transitions. [2022-07-21 09:03:33,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507481077275128 [2022-07-21 09:03:33,975 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4265 transitions. [2022-07-21 09:03:33,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4265 transitions. [2022-07-21 09:03:33,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:33,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4265 transitions. [2022-07-21 09:03:33,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 185.43478260869566) internal successors, (4265), 23 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:33,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:33,992 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:33,992 INFO L186 Difference]: Start difference. First operand has 245 places, 244 transitions, 778 flow. Second operand 23 states and 4265 transitions. [2022-07-21 09:03:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 613 transitions, 3657 flow [2022-07-21 09:03:34,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 613 transitions, 3621 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-21 09:03:34,037 INFO L242 Difference]: Finished difference. Result has 271 places, 419 transitions, 2567 flow [2022-07-21 09:03:34,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2567, PETRI_PLACES=271, PETRI_TRANSITIONS=419} [2022-07-21 09:03:34,038 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 47 predicate places. [2022-07-21 09:03:34,038 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 419 transitions, 2567 flow [2022-07-21 09:03:34,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:34,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:34,040 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:34,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:03:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:34,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1426988084, now seen corresponding path program 2 times [2022-07-21 09:03:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183363700] [2022-07-21 09:03:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183363700] [2022-07-21 09:03:34,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183363700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:34,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:34,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379644470] [2022-07-21 09:03:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:34,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 247 [2022-07-21 09:03:34,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 419 transitions, 2567 flow. Second operand has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:34,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:34,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 247 [2022-07-21 09:03:34,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:38,308 INFO L129 PetriNetUnfolder]: 14780/27656 cut-off events. [2022-07-21 09:03:38,308 INFO L130 PetriNetUnfolder]: For 75441/78029 co-relation queries the response was YES. [2022-07-21 09:03:38,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90985 conditions, 27656 events. 14780/27656 cut-off events. For 75441/78029 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 263958 event pairs, 1738 based on Foata normal form. 602/26876 useless extension candidates. Maximal degree in co-relation 90956. Up to 9395 conditions per place. [2022-07-21 09:03:38,860 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 285 selfloop transitions, 166 changer transitions 0/632 dead transitions. [2022-07-21 09:03:38,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 632 transitions, 5141 flow [2022-07-21 09:03:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:03:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:03:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1507 transitions. [2022-07-21 09:03:38,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.871602082128398 [2022-07-21 09:03:38,863 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1507 transitions. [2022-07-21 09:03:38,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1507 transitions. [2022-07-21 09:03:38,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:38,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1507 transitions. [2022-07-21 09:03:38,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.28571428571428) internal successors, (1507), 7 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:38,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:38,870 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:38,870 INFO L186 Difference]: Start difference. First operand has 271 places, 419 transitions, 2567 flow. Second operand 7 states and 1507 transitions. [2022-07-21 09:03:38,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 632 transitions, 5141 flow [2022-07-21 09:03:39,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 632 transitions, 5079 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:39,302 INFO L242 Difference]: Finished difference. Result has 281 places, 493 transitions, 3898 flow [2022-07-21 09:03:39,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3898, PETRI_PLACES=281, PETRI_TRANSITIONS=493} [2022-07-21 09:03:39,303 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 57 predicate places. [2022-07-21 09:03:39,303 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 493 transitions, 3898 flow [2022-07-21 09:03:39,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:39,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:39,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:03:39,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1444538644, now seen corresponding path program 3 times [2022-07-21 09:03:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81504944] [2022-07-21 09:03:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:39,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81504944] [2022-07-21 09:03:39,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81504944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:39,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:39,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528520925] [2022-07-21 09:03:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:39,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-21 09:03:39,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 493 transitions, 3898 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:39,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:39,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-21 09:03:39,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:43,710 INFO L129 PetriNetUnfolder]: 15535/27948 cut-off events. [2022-07-21 09:03:43,710 INFO L130 PetriNetUnfolder]: For 103597/105179 co-relation queries the response was YES. [2022-07-21 09:03:44,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102912 conditions, 27948 events. 15535/27948 cut-off events. For 103597/105179 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 255952 event pairs, 1007 based on Foata normal form. 458/27492 useless extension candidates. Maximal degree in co-relation 102878. Up to 6111 conditions per place. [2022-07-21 09:03:44,262 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 329 selfloop transitions, 136 changer transitions 0/650 dead transitions. [2022-07-21 09:03:44,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 650 transitions, 6270 flow [2022-07-21 09:03:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:03:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:03:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1319 transitions. [2022-07-21 09:03:44,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8900134952766532 [2022-07-21 09:03:44,265 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1319 transitions. [2022-07-21 09:03:44,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1319 transitions. [2022-07-21 09:03:44,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:44,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1319 transitions. [2022-07-21 09:03:44,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.83333333333334) internal successors, (1319), 6 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:44,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:44,271 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:44,271 INFO L186 Difference]: Start difference. First operand has 281 places, 493 transitions, 3898 flow. Second operand 6 states and 1319 transitions. [2022-07-21 09:03:44,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 650 transitions, 6270 flow [2022-07-21 09:03:45,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 650 transitions, 6240 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:45,112 INFO L242 Difference]: Finished difference. Result has 290 places, 525 transitions, 4824 flow [2022-07-21 09:03:45,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4824, PETRI_PLACES=290, PETRI_TRANSITIONS=525} [2022-07-21 09:03:45,113 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 66 predicate places. [2022-07-21 09:03:45,113 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 525 transitions, 4824 flow [2022-07-21 09:03:45,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:45,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:45,114 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:45,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:03:45,114 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1433283384, now seen corresponding path program 4 times [2022-07-21 09:03:45,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:45,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831039811] [2022-07-21 09:03:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:45,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831039811] [2022-07-21 09:03:45,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831039811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:45,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:45,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28925149] [2022-07-21 09:03:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:45,205 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-21 09:03:45,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 525 transitions, 4824 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:45,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:45,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-21 09:03:45,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:49,836 INFO L129 PetriNetUnfolder]: 15233/27247 cut-off events. [2022-07-21 09:03:49,836 INFO L130 PetriNetUnfolder]: For 130336/132001 co-relation queries the response was YES. [2022-07-21 09:03:50,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107423 conditions, 27247 events. 15233/27247 cut-off events. For 130336/132001 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 246417 event pairs, 531 based on Foata normal form. 280/26579 useless extension candidates. Maximal degree in co-relation 107384. Up to 7933 conditions per place. [2022-07-21 09:03:50,179 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 304 selfloop transitions, 86 changer transitions 0/575 dead transitions. [2022-07-21 09:03:50,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 575 transitions, 5991 flow [2022-07-21 09:03:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:03:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:03:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2022-07-21 09:03:50,181 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8923076923076924 [2022-07-21 09:03:50,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2022-07-21 09:03:50,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2022-07-21 09:03:50,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:50,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2022-07-21 09:03:50,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:50,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:50,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:50,185 INFO L186 Difference]: Start difference. First operand has 290 places, 525 transitions, 4824 flow. Second operand 5 states and 1102 transitions. [2022-07-21 09:03:50,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 575 transitions, 5991 flow [2022-07-21 09:03:51,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 575 transitions, 5927 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:51,288 INFO L242 Difference]: Finished difference. Result has 297 places, 528 transitions, 5165 flow [2022-07-21 09:03:51,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5165, PETRI_PLACES=297, PETRI_TRANSITIONS=528} [2022-07-21 09:03:51,290 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 73 predicate places. [2022-07-21 09:03:51,290 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 528 transitions, 5165 flow [2022-07-21 09:03:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:51,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:51,291 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:03:51,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 139212771, now seen corresponding path program 1 times [2022-07-21 09:03:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:51,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063633660] [2022-07-21 09:03:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063633660] [2022-07-21 09:03:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063633660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663843821] [2022-07-21 09:03:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:51,929 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) [2022-07-21 09:03:51,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:03:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 09:03:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:53,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:03:53,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:03:54,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:03:54,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:03:54,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:03:54,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 7 [2022-07-21 09:03:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:54,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:56,614 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:03:56,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 61 [2022-07-21 09:03:56,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5131 treesize of output 5003 [2022-07-21 09:03:56,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5003 treesize of output 4619 [2022-07-21 09:03:56,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2407 treesize of output 2215 [2022-07-21 09:03:56,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4427 treesize of output 3659 [2022-07-21 09:03:56,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3659 treesize of output 3563