./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/bench-exp2x6.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 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:19:52,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:19:52,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:19:52,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:19:52,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:19:52,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:19:52,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:19:52,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:19:52,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:19:52,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:19:52,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:19:52,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:19:52,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:19:52,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:19:52,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:19:52,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:19:52,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:19:52,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:19:52,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:19:52,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:19:52,349 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:19:52,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:19:52,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:19:52,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:19:52,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:19:52,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:19:52,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:19:52,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:19:52,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:19:52,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:19:52,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:19:52,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:19:52,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:19:52,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:19:52,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:19:52,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:19:52,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:19:52,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:19:52,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:19:52,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:19:52,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:19:52,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:19:52,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:19:52,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:19:52,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:19:52,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:19:52,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:19:52,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:19:52,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:19:52,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:19:52,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:19:52,391 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:19:52,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:19:52,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:19:52,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:19:52,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:19:52,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:19:52,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:19:52,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:19:52,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:19:52,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:19:52,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:52,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:19:52,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:19:52,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:19:52,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-07-12 10:19:52,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:19:52,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:19:52,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:19:52,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:19:52,602 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:19:52,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-12 10:19:52,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70ca69e4b/00fec93088c44d17aadaebd5cf6a637a/FLAGb9042fd05 [2022-07-12 10:19:53,000 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:19:53,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-12 10:19:53,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70ca69e4b/00fec93088c44d17aadaebd5cf6a637a/FLAGb9042fd05 [2022-07-12 10:19:53,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70ca69e4b/00fec93088c44d17aadaebd5cf6a637a [2022-07-12 10:19:53,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:19:53,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:19:53,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:53,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:19:53,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:19:53,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a834d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53, skipping insertion in model container [2022-07-12 10:19:53,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:19:53,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:19:53,186 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/bench-exp2x6.wvr.c[2453,2466] [2022-07-12 10:19:53,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:53,193 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:19:53,214 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/bench-exp2x6.wvr.c[2453,2466] [2022-07-12 10:19:53,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:53,227 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:19:53,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53 WrapperNode [2022-07-12 10:19:53,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:53,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:53,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:19:53,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:19:53,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,269 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-12 10:19:53,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:53,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:19:53,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:19:53,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:19:53,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:19:53,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:19:53,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:19:53,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:19:53,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (1/1) ... [2022-07-12 10:19:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:53,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:53,352 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) [2022-07-12 10:19:53,357 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 [2022-07-12 10:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:19:53,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:19:53,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:19:53,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:19:53,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:19:53,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:19:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-12 10:19:53,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-12 10:19:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:19:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:19:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:19:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:19:53,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:19:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:19:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:19:53,388 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:19:53,443 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:19:53,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:19:53,670 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:19:53,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:19:53,677 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:19:53,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:53 BoogieIcfgContainer [2022-07-12 10:19:53,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:19:53,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:19:53,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:19:53,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:19:53,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:19:53" (1/3) ... [2022-07-12 10:19:53,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fac393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:53, skipping insertion in model container [2022-07-12 10:19:53,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:53" (2/3) ... [2022-07-12 10:19:53,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fac393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:53, skipping insertion in model container [2022-07-12 10:19:53,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:53" (3/3) ... [2022-07-12 10:19:53,688 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-07-12 10:19:53,693 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:19:53,702 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:19:53,702 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:19:53,703 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:19:53,764 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:19:53,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-07-12 10:19:53,870 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2022-07-12 10:19:53,870 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:19:53,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-07-12 10:19:53,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-07-12 10:19:53,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-07-12 10:19:53,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:53,898 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@5cfc9ec5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4140b518 [2022-07-12 10:19:53,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:19:53,919 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2022-07-12 10:19:53,919 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:19:53,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:53,920 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] [2022-07-12 10:19:53,920 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)] === [2022-07-12 10:19:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash -315421393, now seen corresponding path program 1 times [2022-07-12 10:19:53,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105588682] [2022-07-12 10:19:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:54,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105588682] [2022-07-12 10:19:54,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105588682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:54,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:54,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552481827] [2022-07-12 10:19:54,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:54,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:54,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2022-07-12 10:19:54,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:54,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2022-07-12 10:19:54,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:54,250 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2022-07-12 10:19:54,250 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:19:54,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2022-07-12 10:19:54,253 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2022-07-12 10:19:54,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2022-07-12 10:19:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-12 10:19:54,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2022-07-12 10:19:54,268 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-12 10:19:54,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-12 10:19:54,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:54,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-12 10:19:54,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,292 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,293 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2022-07-12 10:19:54,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2022-07-12 10:19:54,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:19:54,314 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2022-07-12 10:19:54,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2022-07-12 10:19:54,318 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-07-12 10:19:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2022-07-12 10:19:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:54,319 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] [2022-07-12 10:19:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:19:54,320 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)] === [2022-07-12 10:19:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1566756150, now seen corresponding path program 1 times [2022-07-12 10:19:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166021691] [2022-07-12 10:19:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:54,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166021691] [2022-07-12 10:19:54,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166021691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:54,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:54,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462554682] [2022-07-12 10:19:54,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:54,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:54,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:54,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2022-07-12 10:19:54,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:54,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2022-07-12 10:19:54,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:55,756 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2022-07-12 10:19:55,757 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2022-07-12 10:19:55,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52427 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2022-07-12 10:19:55,879 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2022-07-12 10:19:55,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2022-07-12 10:19:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:19:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:19:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2022-07-12 10:19:55,884 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2022-07-12 10:19:55,884 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2022-07-12 10:19:55,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2022-07-12 10:19:55,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:55,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2022-07-12 10:19:55,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,889 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2022-07-12 10:19:55,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2022-07-12 10:19:55,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:55,894 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2022-07-12 10:19:55,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2022-07-12 10:19:55,895 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-07-12 10:19:55,895 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2022-07-12 10:19:55,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:55,896 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] [2022-07-12 10:19:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:19:55,896 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)] === [2022-07-12 10:19:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:55,896 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2022-07-12 10:19:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:55,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377771317] [2022-07-12 10:19:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:55,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:56,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377771317] [2022-07-12 10:19:56,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377771317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928476554] [2022-07-12 10:19:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:56,167 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) [2022-07-12 10:19:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:19:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:56,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:19:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:56,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:56,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928476554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:56,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:56,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:19:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163811919] [2022-07-12 10:19:56,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:19:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:19:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:19:56,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:19:56,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:56,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:56,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:19:56,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:58,373 INFO L129 PetriNetUnfolder]: 9819/14701 cut-off events. [2022-07-12 10:19:58,373 INFO L130 PetriNetUnfolder]: For 2287/2361 co-relation queries the response was YES. [2022-07-12 10:19:58,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31278 conditions, 14701 events. 9819/14701 cut-off events. For 2287/2361 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 94613 event pairs, 1381 based on Foata normal form. 2/12471 useless extension candidates. Maximal degree in co-relation 31271. Up to 6565 conditions per place. [2022-07-12 10:19:58,476 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 181 selfloop transitions, 26 changer transitions 1/270 dead transitions. [2022-07-12 10:19:58,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 270 transitions, 1086 flow [2022-07-12 10:19:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-12 10:19:58,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-12 10:19:58,480 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-12 10:19:58,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-12 10:19:58,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:58,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-12 10:19:58,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:58,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:58,492 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:58,492 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 14 states and 1306 transitions. [2022-07-12 10:19:58,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 270 transitions, 1086 flow [2022-07-12 10:19:58,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 1063 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-12 10:19:58,501 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 434 flow [2022-07-12 10:19:58,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=434, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2022-07-12 10:19:58,503 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-07-12 10:19:58,503 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 434 flow [2022-07-12 10:19:58,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:58,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:58,504 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] [2022-07-12 10:19:58,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:58,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:58,726 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)] === [2022-07-12 10:19:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -291748005, now seen corresponding path program 2 times [2022-07-12 10:19:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592237013] [2022-07-12 10:19:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:58,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592237013] [2022-07-12 10:19:58,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592237013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:58,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:58,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225266329] [2022-07-12 10:19:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:58,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:58,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:58,915 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:19:58,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:58,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:58,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:19:58,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:00,132 INFO L129 PetriNetUnfolder]: 9701/14987 cut-off events. [2022-07-12 10:20:00,133 INFO L130 PetriNetUnfolder]: For 20337/20370 co-relation queries the response was YES. [2022-07-12 10:20:00,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40057 conditions, 14987 events. 9701/14987 cut-off events. For 20337/20370 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 99177 event pairs, 5925 based on Foata normal form. 35/13578 useless extension candidates. Maximal degree in co-relation 40044. Up to 12875 conditions per place. [2022-07-12 10:20:00,241 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2022-07-12 10:20:00,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 742 flow [2022-07-12 10:20:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:20:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:20:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-12 10:20:00,245 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-12 10:20:00,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-12 10:20:00,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-12 10:20:00,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:00,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-12 10:20:00,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:00,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:00,248 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:00,248 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 434 flow. Second operand 6 states and 550 transitions. [2022-07-12 10:20:00,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 742 flow [2022-07-12 10:20:00,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 158 transitions, 727 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:20:00,275 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 502 flow [2022-07-12 10:20:00,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2022-07-12 10:20:00,277 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2022-07-12 10:20:00,277 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 502 flow [2022-07-12 10:20:00,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:00,279 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:00,279 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] [2022-07-12 10:20:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:20:00,279 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)] === [2022-07-12 10:20:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 38846005, now seen corresponding path program 1 times [2022-07-12 10:20:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922123986] [2022-07-12 10:20:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922123986] [2022-07-12 10:20:00,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922123986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865215228] [2022-07-12 10:20:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:00,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:00,564 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) [2022-07-12 10:20:00,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:20:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:20:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:00,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865215228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:01,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:20:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304512303] [2022-07-12 10:20:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:20:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:20:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:20:01,038 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:20:01,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 502 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:01,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:01,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:20:01,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:03,245 INFO L129 PetriNetUnfolder]: 15341/24600 cut-off events. [2022-07-12 10:20:03,246 INFO L130 PetriNetUnfolder]: For 39084/39167 co-relation queries the response was YES. [2022-07-12 10:20:03,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66755 conditions, 24600 events. 15341/24600 cut-off events. For 39084/39167 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 183614 event pairs, 2068 based on Foata normal form. 2/22703 useless extension candidates. Maximal degree in co-relation 66739. Up to 10037 conditions per place. [2022-07-12 10:20:03,447 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 255 selfloop transitions, 30 changer transitions 1/348 dead transitions. [2022-07-12 10:20:03,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 348 transitions, 2165 flow [2022-07-12 10:20:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:20:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:20:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-12 10:20:03,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-12 10:20:03,450 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-12 10:20:03,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-12 10:20:03,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:03,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-12 10:20:03,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,456 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,456 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 502 flow. Second operand 14 states and 1306 transitions. [2022-07-12 10:20:03,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 348 transitions, 2165 flow [2022-07-12 10:20:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 348 transitions, 2090 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-12 10:20:03,489 INFO L242 Difference]: Finished difference. Result has 160 places, 152 transitions, 677 flow [2022-07-12 10:20:03,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=677, PETRI_PLACES=160, PETRI_TRANSITIONS=152} [2022-07-12 10:20:03,492 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 37 predicate places. [2022-07-12 10:20:03,492 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 152 transitions, 677 flow [2022-07-12 10:20:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:03,493 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] [2022-07-12 10:20:03,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:03,696 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)] === [2022-07-12 10:20:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1609667139, now seen corresponding path program 2 times [2022-07-12 10:20:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136137042] [2022-07-12 10:20:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:03,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:03,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136137042] [2022-07-12 10:20:03,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136137042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:03,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:03,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:20:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340827907] [2022-07-12 10:20:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:03,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:20:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:20:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:20:03,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:20:03,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 152 transitions, 677 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:03,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:03,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:20:03,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:05,913 INFO L129 PetriNetUnfolder]: 15101/23111 cut-off events. [2022-07-12 10:20:05,913 INFO L130 PetriNetUnfolder]: For 50097/50148 co-relation queries the response was YES. [2022-07-12 10:20:06,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77177 conditions, 23111 events. 15101/23111 cut-off events. For 50097/50148 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 161465 event pairs, 7081 based on Foata normal form. 21/22936 useless extension candidates. Maximal degree in co-relation 77153. Up to 20415 conditions per place. [2022-07-12 10:20:06,201 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 95 selfloop transitions, 17 changer transitions 8/182 dead transitions. [2022-07-12 10:20:06,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 182 transitions, 1127 flow [2022-07-12 10:20:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:20:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:20:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-12 10:20:06,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-12 10:20:06,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-12 10:20:06,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-12 10:20:06,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:06,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-12 10:20:06,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,215 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,215 INFO L186 Difference]: Start difference. First operand has 160 places, 152 transitions, 677 flow. Second operand 6 states and 550 transitions. [2022-07-12 10:20:06,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 182 transitions, 1127 flow [2022-07-12 10:20:06,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 182 transitions, 1119 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-12 10:20:06,361 INFO L242 Difference]: Finished difference. Result has 164 places, 156 transitions, 774 flow [2022-07-12 10:20:06,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=164, PETRI_TRANSITIONS=156} [2022-07-12 10:20:06,362 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 41 predicate places. [2022-07-12 10:20:06,362 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 156 transitions, 774 flow [2022-07-12 10:20:06,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:06,363 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] [2022-07-12 10:20:06,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:20:06,363 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)] === [2022-07-12 10:20:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905056, now seen corresponding path program 1 times [2022-07-12 10:20:06,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364719135] [2022-07-12 10:20:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:06,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364719135] [2022-07-12 10:20:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364719135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:06,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:20:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132779942] [2022-07-12 10:20:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:20:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:20:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:20:06,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:20:06,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 156 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:06,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:20:06,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:08,684 INFO L129 PetriNetUnfolder]: 16638/25497 cut-off events. [2022-07-12 10:20:08,685 INFO L130 PetriNetUnfolder]: For 65358/65421 co-relation queries the response was YES. [2022-07-12 10:20:08,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86692 conditions, 25497 events. 16638/25497 cut-off events. For 65358/65421 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 179760 event pairs, 8095 based on Foata normal form. 480/25661 useless extension candidates. Maximal degree in co-relation 86665. Up to 16663 conditions per place. [2022-07-12 10:20:08,944 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 21 changer transitions 2/217 dead transitions. [2022-07-12 10:20:08,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1451 flow [2022-07-12 10:20:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:20:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:20:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-12 10:20:08,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-12 10:20:08,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-12 10:20:08,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-12 10:20:08,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:08,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-12 10:20:08,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,950 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,950 INFO L186 Difference]: Start difference. First operand has 164 places, 156 transitions, 774 flow. Second operand 7 states and 649 transitions. [2022-07-12 10:20:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1451 flow [2022-07-12 10:20:09,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1412 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-12 10:20:09,136 INFO L242 Difference]: Finished difference. Result has 169 places, 157 transitions, 816 flow [2022-07-12 10:20:09,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=816, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2022-07-12 10:20:09,137 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 46 predicate places. [2022-07-12 10:20:09,137 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 816 flow [2022-07-12 10:20:09,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:09,138 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] [2022-07-12 10:20:09,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:20:09,138 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)] === [2022-07-12 10:20:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2065430376, now seen corresponding path program 1 times [2022-07-12 10:20:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:09,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421062863] [2022-07-12 10:20:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:09,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421062863] [2022-07-12 10:20:09,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421062863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:09,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:09,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:20:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89456524] [2022-07-12 10:20:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:09,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:20:09,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:20:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:20:09,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-12 10:20:09,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:09,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-12 10:20:09,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:11,775 INFO L129 PetriNetUnfolder]: 18218/27769 cut-off events. [2022-07-12 10:20:11,775 INFO L130 PetriNetUnfolder]: For 80925/80966 co-relation queries the response was YES. [2022-07-12 10:20:11,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99125 conditions, 27769 events. 18218/27769 cut-off events. For 80925/80966 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 195341 event pairs, 9843 based on Foata normal form. 488/27942 useless extension candidates. Maximal degree in co-relation 99097. Up to 19090 conditions per place. [2022-07-12 10:20:12,023 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2022-07-12 10:20:12,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 1531 flow [2022-07-12 10:20:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:20:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:20:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-12 10:20:12,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-12 10:20:12,026 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-12 10:20:12,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-12 10:20:12,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:12,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-12 10:20:12,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,029 INFO L186 Difference]: Start difference. First operand has 169 places, 157 transitions, 816 flow. Second operand 7 states and 649 transitions. [2022-07-12 10:20:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 1531 flow [2022-07-12 10:20:12,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1506 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:20:12,207 INFO L242 Difference]: Finished difference. Result has 173 places, 158 transitions, 870 flow [2022-07-12 10:20:12,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-07-12 10:20:12,208 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2022-07-12 10:20:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 870 flow [2022-07-12 10:20:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,208 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:12,209 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] [2022-07-12 10:20:12,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:20:12,209 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)] === [2022-07-12 10:20:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1961029637, now seen corresponding path program 1 times [2022-07-12 10:20:12,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803291597] [2022-07-12 10:20:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803291597] [2022-07-12 10:20:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803291597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059671276] [2022-07-12 10:20:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:13,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:13,336 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) [2022-07-12 10:20:13,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process