./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:27:52,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:27:52,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:27:52,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:27:52,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:27:52,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:27:52,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:27:52,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:27:52,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:27:52,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:27:52,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:27:52,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:27:52,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:27:52,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:27:52,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:27:52,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:27:52,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:27:52,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:27:52,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:27:52,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:27:52,310 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:27:52,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:27:52,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:27:52,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:27:52,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:27:52,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:27:52,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:27:52,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:27:52,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:27:52,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:27:52,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:27:52,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:27:52,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:27:52,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:27:52,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:27:52,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:27:52,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:27:52,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:27:52,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:27:52,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:27:52,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:27:52,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:27:52,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:27:52,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:27:52,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:27:52,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:27:52,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:27:52,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:27:52,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:27:52,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:27:52,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:27:52,358 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:27:52,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:27:52,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:27:52,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:27:52,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:27:52,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:27:52,362 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:27:52,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:27:52,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:27:52,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:27:52,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:27:52,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:52,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:27:52,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:27:52,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:27:52,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:27:52,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:27:52,365 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:27:52,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:27:52,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:27:52,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-07-19 21:27:52,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:27:52,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:27:52,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:27:52,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:27:52,645 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:27:52,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-19 21:27:52,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ded3578/535380156016413baf08074178aecdcd/FLAGc76f87687 [2022-07-19 21:27:53,124 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:27:53,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-19 21:27:53,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ded3578/535380156016413baf08074178aecdcd/FLAGc76f87687 [2022-07-19 21:27:53,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ded3578/535380156016413baf08074178aecdcd [2022-07-19 21:27:53,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:27:53,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:27:53,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:53,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:27:53,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:27:53,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168e5ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53, skipping insertion in model container [2022-07-19 21:27:53,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:27:53,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:27:53,721 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/mult-comm.wvr.c[1910,1923] [2022-07-19 21:27:53,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:53,731 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:27:53,747 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/mult-comm.wvr.c[1910,1923] [2022-07-19 21:27:53,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:53,761 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:27:53,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53 WrapperNode [2022-07-19 21:27:53,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:53,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:53,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:27:53,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:27:53,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,798 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-07-19 21:27:53,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:53,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:27:53,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:27:53,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:27:53,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:27:53,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:27:53,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:27:53,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:27:53,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (1/1) ... [2022-07-19 21:27:53,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:53,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:53,881 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) [2022-07-19 21:27:53,886 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 [2022-07-19 21:27:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:27:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:27:53,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:27:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:27:53,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:27:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:27:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:27:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:27:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:27:53,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:27:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:27:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:27:53,919 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:27:53,982 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:27:53,983 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:27:54,113 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:27:54,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:27:54,120 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:27:54,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:54 BoogieIcfgContainer [2022-07-19 21:27:54,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:27:54,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:27:54,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:27:54,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:27:54,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:27:53" (1/3) ... [2022-07-19 21:27:54,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efe555b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:54, skipping insertion in model container [2022-07-19 21:27:54,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:53" (2/3) ... [2022-07-19 21:27:54,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efe555b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:54, skipping insertion in model container [2022-07-19 21:27:54,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:54" (3/3) ... [2022-07-19 21:27:54,150 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-07-19 21:27:54,160 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:27:54,181 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:27:54,182 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:27:54,182 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:27:54,276 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:27:54,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-07-19 21:27:54,386 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-07-19 21:27:54,387 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:27:54,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-07-19 21:27:54,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-07-19 21:27:54,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-07-19 21:27:54,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:27:54,411 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@1595e6de, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4de3d505 [2022-07-19 21:27:54,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:27:54,435 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-19 21:27:54,437 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:27:54,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:54,438 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] [2022-07-19 21:27:54,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1905633102, now seen corresponding path program 1 times [2022-07-19 21:27:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181950417] [2022-07-19 21:27:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:54,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:54,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181950417] [2022-07-19 21:27:54,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181950417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:54,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:54,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:27:54,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052272136] [2022-07-19 21:27:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:27:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:27:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:27:54,675 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-07-19 21:27:54,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:54,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-07-19 21:27:54,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:54,710 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-07-19 21:27:54,710 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:27:54,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-07-19 21:27:54,712 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-07-19 21:27:54,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-07-19 21:27:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:27:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:27:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-07-19 21:27:54,725 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-07-19 21:27:54,726 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-07-19 21:27:54,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-07-19 21:27:54,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:54,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-07-19 21:27:54,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,737 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,739 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-07-19 21:27:54,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-07-19 21:27:54,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:27:54,745 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-07-19 21:27:54,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-07-19 21:27:54,751 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-07-19 21:27:54,751 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-07-19 21:27:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,752 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:54,752 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] [2022-07-19 21:27:54,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:27:54,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-07-19 21:27:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:54,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257538752] [2022-07-19 21:27:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257538752] [2022-07-19 21:27:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257538752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:55,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093916049] [2022-07-19 21:27:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:55,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:55,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-07-19 21:27:55,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:55,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-07-19 21:27:55,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:55,131 INFO L129 PetriNetUnfolder]: 12/131 cut-off events. [2022-07-19 21:27:55,132 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:27:55,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 131 events. 12/131 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 1 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 171. Up to 19 conditions per place. [2022-07-19 21:27:55,133 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-19 21:27:55,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-07-19 21:27:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:27:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:27:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-07-19 21:27:55,138 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-07-19 21:27:55,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-07-19 21:27:55,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-07-19 21:27:55,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:55,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-07-19 21:27:55,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,145 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,145 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-07-19 21:27:55,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-07-19 21:27:55,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:27:55,148 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-07-19 21:27:55,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-07-19 21:27:55,149 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-07-19 21:27:55,149 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-07-19 21:27:55,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:55,150 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] [2022-07-19 21:27:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:27:55,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash -919337767, now seen corresponding path program 1 times [2022-07-19 21:27:55,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906892444] [2022-07-19 21:27:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:55,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:55,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906892444] [2022-07-19 21:27:55,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906892444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640961622] [2022-07-19 21:27:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:55,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:55,580 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) [2022-07-19 21:27:55,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:27:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 21:27:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:56,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640961622] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:56,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:27:56,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 17 [2022-07-19 21:27:56,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284595] [2022-07-19 21:27:56,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:56,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:27:56,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:27:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:27:56,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:27:56,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:56,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:27:56,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:56,649 INFO L129 PetriNetUnfolder]: 121/397 cut-off events. [2022-07-19 21:27:56,649 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-19 21:27:56,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 397 events. 121/397 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1906 event pairs, 19 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 739. Up to 64 conditions per place. [2022-07-19 21:27:56,654 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 63 selfloop transitions, 16 changer transitions 7/127 dead transitions. [2022-07-19 21:27:56,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 492 flow [2022-07-19 21:27:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:27:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:27:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2022-07-19 21:27:56,658 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.74625 [2022-07-19 21:27:56,658 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2022-07-19 21:27:56,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2022-07-19 21:27:56,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:56,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2022-07-19 21:27:56,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,664 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,664 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 10 states and 597 transitions. [2022-07-19 21:27:56,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 492 flow [2022-07-19 21:27:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 478 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:56,669 INFO L242 Difference]: Finished difference. Result has 85 places, 79 transitions, 256 flow [2022-07-19 21:27:56,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2022-07-19 21:27:56,670 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-07-19 21:27:56,670 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 256 flow [2022-07-19 21:27:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:56,671 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] [2022-07-19 21:27:56,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:27:56,891 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 [2022-07-19 21:27:56,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1709159913, now seen corresponding path program 1 times [2022-07-19 21:27:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218507726] [2022-07-19 21:27:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:56,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:57,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218507726] [2022-07-19 21:27:57,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218507726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780514638] [2022-07-19 21:27:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:57,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:57,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:57,043 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) [2022-07-19 21:27:57,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:27:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:27:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:57,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:58,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780514638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:58,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:58,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-07-19 21:27:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273657634] [2022-07-19 21:27:58,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:58,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:27:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:27:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:27:58,134 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-19 21:27:58,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:58,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-19 21:27:58,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:58,776 INFO L129 PetriNetUnfolder]: 44/267 cut-off events. [2022-07-19 21:27:58,777 INFO L130 PetriNetUnfolder]: For 146/166 co-relation queries the response was YES. [2022-07-19 21:27:58,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 267 events. 44/267 cut-off events. For 146/166 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1173 event pairs, 10 based on Foata normal form. 8/257 useless extension candidates. Maximal degree in co-relation 553. Up to 76 conditions per place. [2022-07-19 21:27:58,791 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 30 selfloop transitions, 10 changer transitions 11/103 dead transitions. [2022-07-19 21:27:58,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 443 flow [2022-07-19 21:27:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:27:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:27:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-19 21:27:58,793 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-19 21:27:58,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-19 21:27:58,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-19 21:27:58,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:58,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-19 21:27:58,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,798 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,798 INFO L186 Difference]: Start difference. First operand has 85 places, 79 transitions, 256 flow. Second operand 10 states and 608 transitions. [2022-07-19 21:27:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 443 flow [2022-07-19 21:27:58,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 411 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-07-19 21:27:58,803 INFO L242 Difference]: Finished difference. Result has 93 places, 81 transitions, 281 flow [2022-07-19 21:27:58,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2022-07-19 21:27:58,804 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 22 predicate places. [2022-07-19 21:27:58,804 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 281 flow [2022-07-19 21:27:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:58,805 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] [2022-07-19 21:27:58,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 21:27:59,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash -446523295, now seen corresponding path program 2 times [2022-07-19 21:27:59,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:59,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728158088] [2022-07-19 21:27:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:59,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:59,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728158088] [2022-07-19 21:27:59,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728158088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523455104] [2022-07-19 21:27:59,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:27:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:59,241 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) [2022-07-19 21:27:59,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:27:59,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:27:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 21:27:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523455104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:59,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:59,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 16 [2022-07-19 21:27:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696350180] [2022-07-19 21:27:59,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:59,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:27:59,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:27:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:27:59,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:27:59,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 281 flow. Second operand has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:59,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:27:59,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:00,233 INFO L129 PetriNetUnfolder]: 154/573 cut-off events. [2022-07-19 21:28:00,233 INFO L130 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2022-07-19 21:28:00,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 573 events. 154/573 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3230 event pairs, 45 based on Foata normal form. 3/572 useless extension candidates. Maximal degree in co-relation 1347. Up to 160 conditions per place. [2022-07-19 21:28:00,238 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 78 selfloop transitions, 30 changer transitions 18/167 dead transitions. [2022-07-19 21:28:00,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 875 flow [2022-07-19 21:28:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:28:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:28:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1089 transitions. [2022-07-19 21:28:00,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-07-19 21:28:00,242 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1089 transitions. [2022-07-19 21:28:00,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1089 transitions. [2022-07-19 21:28:00,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:00,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1089 transitions. [2022-07-19 21:28:00,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.31578947368421) internal successors, (1089), 19 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,250 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,250 INFO L186 Difference]: Start difference. First operand has 93 places, 81 transitions, 281 flow. Second operand 19 states and 1089 transitions. [2022-07-19 21:28:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 875 flow [2022-07-19 21:28:00,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 812 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-07-19 21:28:00,259 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 492 flow [2022-07-19 21:28:00,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=492, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-07-19 21:28:00,262 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2022-07-19 21:28:00,262 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 492 flow [2022-07-19 21:28:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:00,264 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] [2022-07-19 21:28:00,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:00,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -652524683, now seen corresponding path program 3 times [2022-07-19 21:28:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:00,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423634573] [2022-07-19 21:28:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423634573] [2022-07-19 21:28:00,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423634573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979348283] [2022-07-19 21:28:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:28:00,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:00,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:00,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:00,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:28:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:28:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 21:28:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:00,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:01,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979348283] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:01,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:28:01,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-07-19 21:28:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186551205] [2022-07-19 21:28:01,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:01,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:28:01,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:28:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:28:01,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:28:01,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:01,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:28:01,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:01,570 INFO L129 PetriNetUnfolder]: 154/587 cut-off events. [2022-07-19 21:28:01,570 INFO L130 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2022-07-19 21:28:01,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 587 events. 154/587 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3314 event pairs, 60 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1623. Up to 267 conditions per place. [2022-07-19 21:28:01,575 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 58 selfloop transitions, 12 changer transitions 15/126 dead transitions. [2022-07-19 21:28:01,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 819 flow [2022-07-19 21:28:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:28:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:28:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-07-19 21:28:01,578 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-07-19 21:28:01,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-07-19 21:28:01,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-07-19 21:28:01,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:01,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-07-19 21:28:01,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,582 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,582 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 492 flow. Second operand 9 states and 520 transitions. [2022-07-19 21:28:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 819 flow [2022-07-19 21:28:01,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 706 flow, removed 35 selfloop flow, removed 12 redundant places. [2022-07-19 21:28:01,603 INFO L242 Difference]: Finished difference. Result has 107 places, 97 transitions, 445 flow [2022-07-19 21:28:01,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-07-19 21:28:01,604 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-07-19 21:28:01,605 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 445 flow [2022-07-19 21:28:01,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:01,605 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] [2022-07-19 21:28:01,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:01,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:01,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash -662099525, now seen corresponding path program 2 times [2022-07-19 21:28:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992725633] [2022-07-19 21:28:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:01,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992725633] [2022-07-19 21:28:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992725633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410185617] [2022-07-19 21:28:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:28:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:01,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:02,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:28:02,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:28:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:28:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:02,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:03,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410185617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:03,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:03,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-19 21:28:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385469700] [2022-07-19 21:28:03,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:28:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:28:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:28:03,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-19 21:28:03,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:03,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-19 21:28:03,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:03,477 INFO L129 PetriNetUnfolder]: 77/445 cut-off events. [2022-07-19 21:28:03,478 INFO L130 PetriNetUnfolder]: For 583/620 co-relation queries the response was YES. [2022-07-19 21:28:03,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 445 events. 77/445 cut-off events. For 583/620 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2365 event pairs, 7 based on Foata normal form. 16/452 useless extension candidates. Maximal degree in co-relation 1076. Up to 134 conditions per place. [2022-07-19 21:28:03,481 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 44 selfloop transitions, 38 changer transitions 12/150 dead transitions. [2022-07-19 21:28:03,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 899 flow [2022-07-19 21:28:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:28:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:28:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-07-19 21:28:03,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-07-19 21:28:03,485 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-07-19 21:28:03,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-07-19 21:28:03,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:03,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-07-19 21:28:03,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,491 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,491 INFO L186 Difference]: Start difference. First operand has 107 places, 97 transitions, 445 flow. Second operand 17 states and 1026 transitions. [2022-07-19 21:28:03,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 899 flow [2022-07-19 21:28:03,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 841 flow, removed 16 selfloop flow, removed 7 redundant places. [2022-07-19 21:28:03,497 INFO L242 Difference]: Finished difference. Result has 127 places, 117 transitions, 717 flow [2022-07-19 21:28:03,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=717, PETRI_PLACES=127, PETRI_TRANSITIONS=117} [2022-07-19 21:28:03,498 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-19 21:28:03,499 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 117 transitions, 717 flow [2022-07-19 21:28:03,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:03,499 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] [2022-07-19 21:28:03,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:03,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:03,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 119757859, now seen corresponding path program 3 times [2022-07-19 21:28:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326836300] [2022-07-19 21:28:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326836300] [2022-07-19 21:28:03,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326836300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631090294] [2022-07-19 21:28:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:28:03,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:03,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:03,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:28:03,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:28:03,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:28:03,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:04,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:28:04,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631090294] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:04,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:28:04,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 15 [2022-07-19 21:28:04,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116020158] [2022-07-19 21:28:04,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:04,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:28:04,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:28:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:28:04,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-19 21:28:04,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 117 transitions, 717 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:04,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-19 21:28:04,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:04,458 INFO L129 PetriNetUnfolder]: 84/467 cut-off events. [2022-07-19 21:28:04,458 INFO L130 PetriNetUnfolder]: For 1071/1135 co-relation queries the response was YES. [2022-07-19 21:28:04,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 467 events. 84/467 cut-off events. For 1071/1135 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2620 event pairs, 11 based on Foata normal form. 24/483 useless extension candidates. Maximal degree in co-relation 1342. Up to 132 conditions per place. [2022-07-19 21:28:04,462 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 41 selfloop transitions, 42 changer transitions 4/143 dead transitions. [2022-07-19 21:28:04,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 143 transitions, 1076 flow [2022-07-19 21:28:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:28:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:28:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-19 21:28:04,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-19 21:28:04,465 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-19 21:28:04,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-19 21:28:04,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:04,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-19 21:28:04,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,469 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,469 INFO L186 Difference]: Start difference. First operand has 127 places, 117 transitions, 717 flow. Second operand 10 states and 608 transitions. [2022-07-19 21:28:04,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 143 transitions, 1076 flow [2022-07-19 21:28:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1033 flow, removed 17 selfloop flow, removed 8 redundant places. [2022-07-19 21:28:04,478 INFO L242 Difference]: Finished difference. Result has 127 places, 128 transitions, 915 flow [2022-07-19 21:28:04,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=127, PETRI_TRANSITIONS=128} [2022-07-19 21:28:04,479 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-19 21:28:04,479 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 128 transitions, 915 flow [2022-07-19 21:28:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:04,480 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:04,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:04,703 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash 168630357, now seen corresponding path program 4 times [2022-07-19 21:28:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620167736] [2022-07-19 21:28:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:04,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:04,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620167736] [2022-07-19 21:28:04,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620167736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:04,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453521265] [2022-07-19 21:28:04,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:28:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:04,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:04,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:28:05,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:28:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:28:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:05,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:05,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453521265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:05,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:05,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-19 21:28:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115962758] [2022-07-19 21:28:05,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:28:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:28:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:28:05,589 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:28:05,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 128 transitions, 915 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:05,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:28:05,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:06,333 INFO L129 PetriNetUnfolder]: 278/1002 cut-off events. [2022-07-19 21:28:06,333 INFO L130 PetriNetUnfolder]: For 2840/2840 co-relation queries the response was YES. [2022-07-19 21:28:06,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 1002 events. 278/1002 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6937 event pairs, 63 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 3232. Up to 166 conditions per place. [2022-07-19 21:28:06,342 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 108 selfloop transitions, 69 changer transitions 40/258 dead transitions. [2022-07-19 21:28:06,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 2191 flow [2022-07-19 21:28:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:28:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:28:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1547 transitions. [2022-07-19 21:28:06,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7162037037037037 [2022-07-19 21:28:06,348 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1547 transitions. [2022-07-19 21:28:06,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1547 transitions. [2022-07-19 21:28:06,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:06,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1547 transitions. [2022-07-19 21:28:06,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.2962962962963) internal successors, (1547), 27 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,358 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,358 INFO L186 Difference]: Start difference. First operand has 127 places, 128 transitions, 915 flow. Second operand 27 states and 1547 transitions. [2022-07-19 21:28:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 2191 flow [2022-07-19 21:28:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 258 transitions, 2054 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-19 21:28:06,373 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 1213 flow [2022-07-19 21:28:06,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1213, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-07-19 21:28:06,375 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 85 predicate places. [2022-07-19 21:28:06,375 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 1213 flow [2022-07-19 21:28:06,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:06,376 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:06,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:06,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1423120419, now seen corresponding path program 5 times [2022-07-19 21:28:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126118461] [2022-07-19 21:28:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:06,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126118461] [2022-07-19 21:28:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126118461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206146795] [2022-07-19 21:28:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:28:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:06,776 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:06,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:28:06,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:28:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:28:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:07,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:07,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206146795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:07,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:07,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-19 21:28:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812622193] [2022-07-19 21:28:07,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:07,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:28:07,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:28:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:28:07,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-19 21:28:07,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 143 transitions, 1213 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:07,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:07,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-19 21:28:07,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:08,507 INFO L129 PetriNetUnfolder]: 278/981 cut-off events. [2022-07-19 21:28:08,508 INFO L130 PetriNetUnfolder]: For 3817/3817 co-relation queries the response was YES. [2022-07-19 21:28:08,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 981 events. 278/981 cut-off events. For 3817/3817 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6716 event pairs, 57 based on Foata normal form. 2/975 useless extension candidates. Maximal degree in co-relation 3449. Up to 166 conditions per place. [2022-07-19 21:28:08,517 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 113 selfloop transitions, 71 changer transitions 21/246 dead transitions. [2022-07-19 21:28:08,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 246 transitions, 2277 flow [2022-07-19 21:28:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:28:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:28:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1377 transitions. [2022-07-19 21:28:08,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7171875 [2022-07-19 21:28:08,520 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1377 transitions. [2022-07-19 21:28:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1377 transitions. [2022-07-19 21:28:08,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:08,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1377 transitions. [2022-07-19 21:28:08,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.375) internal successors, (1377), 24 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:08,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:08,527 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:08,528 INFO L186 Difference]: Start difference. First operand has 156 places, 143 transitions, 1213 flow. Second operand 24 states and 1377 transitions. [2022-07-19 21:28:08,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 246 transitions, 2277 flow [2022-07-19 21:28:08,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 246 transitions, 2089 flow, removed 48 selfloop flow, removed 20 redundant places. [2022-07-19 21:28:08,546 INFO L242 Difference]: Finished difference. Result has 159 places, 149 transitions, 1372 flow [2022-07-19 21:28:08,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1372, PETRI_PLACES=159, PETRI_TRANSITIONS=149} [2022-07-19 21:28:08,547 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2022-07-19 21:28:08,548 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 149 transitions, 1372 flow [2022-07-19 21:28:08,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:08,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:08,549 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] [2022-07-19 21:28:08,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:08,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:28:08,754 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -824553335, now seen corresponding path program 1 times [2022-07-19 21:28:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:08,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854211614] [2022-07-19 21:28:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854211614] [2022-07-19 21:28:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854211614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622269953] [2022-07-19 21:28:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:09,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:09,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:28:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 21:28:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:10,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:31:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:31:48,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622269953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:31:48,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:31:48,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-07-19 21:31:48,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284356408] [2022-07-19 21:31:48,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:31:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 21:31:48,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:31:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 21:31:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 21:31:48,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-19 21:31:48,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 149 transitions, 1372 flow. Second operand has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:31:48,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:31:48,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-19 21:31:48,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:31:55,947 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 105 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:32:02,225 INFO L129 PetriNetUnfolder]: 366/1233 cut-off events. [2022-07-19 21:32:02,225 INFO L130 PetriNetUnfolder]: For 5197/5197 co-relation queries the response was YES. [2022-07-19 21:32:02,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1233 events. 366/1233 cut-off events. For 5197/5197 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9004 event pairs, 38 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 4465. Up to 242 conditions per place. [2022-07-19 21:32:02,237 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 131 selfloop transitions, 171 changer transitions 26/365 dead transitions. [2022-07-19 21:32:02,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 365 transitions, 3537 flow [2022-07-19 21:32:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:32:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:32:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3115 transitions. [2022-07-19 21:32:02,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6383196721311475 [2022-07-19 21:32:02,242 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3115 transitions. [2022-07-19 21:32:02,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3115 transitions. [2022-07-19 21:32:02,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:02,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3115 transitions. [2022-07-19 21:32:02,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 51.0655737704918) internal successors, (3115), 61 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:02,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:02,254 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:02,255 INFO L186 Difference]: Start difference. First operand has 159 places, 149 transitions, 1372 flow. Second operand 61 states and 3115 transitions. [2022-07-19 21:32:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 365 transitions, 3537 flow [2022-07-19 21:32:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 365 transitions, 3297 flow, removed 32 selfloop flow, removed 19 redundant places. [2022-07-19 21:32:02,285 INFO L242 Difference]: Finished difference. Result has 227 places, 242 transitions, 2659 flow [2022-07-19 21:32:02,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2659, PETRI_PLACES=227, PETRI_TRANSITIONS=242} [2022-07-19 21:32:02,286 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 156 predicate places. [2022-07-19 21:32:02,286 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 242 transitions, 2659 flow [2022-07-19 21:32:02,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:02,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:02,287 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] [2022-07-19 21:32:02,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:32:02,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:32:02,508 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:32:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:02,508 INFO L85 PathProgramCache]: Analyzing trace with hash -538219833, now seen corresponding path program 2 times [2022-07-19 21:32:02,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:02,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997620547] [2022-07-19 21:32:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:02,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997620547] [2022-07-19 21:32:03,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997620547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:32:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419613614] [2022-07-19 21:32:03,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:32:03,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:32:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:32:03,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:32:03,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:32:03,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:32:03,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:32:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 21:32:03,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:32:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:03,994 INFO L328 TraceCheckSpWp]: Computing backward predicates...